for a one-tailed hypothesis test (upper tail), the p-value is computed to be .034. if the test is being conducted at the 5% level of significance, the null hypothesis group of answer choices could be rejected or not rejected depending on the sample mean could be rejected or not rejected depending on the sample size. is rejected. is not rejected.

Answers

Answer 1

For a one-tailed hypothesis test (upper tail), the p-value is computed to be .034. If the test is being conducted at the 5% level of significance, the null hypothesis C. is rejected

A one-tailed hypothesis test refers to a statistical test in which the alternative hypothesis is either greater than or less than the null hypothesis, but not both. Since the problem states that it is a one-tailed hypothesis test (upper tail), the alternative hypothesis, H1, will be a greater than or > sign. Hypothesis testing is the method of determining whether or not an assertion about a population parameter is consistent with sample data. A hypothesis test is conducted to assist in deciding between two competing hypotheses. One hypothesis is the null hypothesis (H0), which is a statement of the population parameter that is being tested.

In a hypothesis test, the null hypothesis is rejected if the test statistic falls in the rejection region. The test statistic, which measures the distance between a sample estimate and the null hypothesis, is used to assess whether or not the null hypothesis should be rejected. Reject the null hypothesis if the p-value is less than or equal to α. Since the p-value of 0.034 is less than the level of significance, α, of 0.05, the null hypothesis will be rejected, according to the question above. Therefore, option C is correct.

The Question was Incomplete, Find the full content below :

For a one-tailed hypothesis test (upper tail), the p-value is computed to be .034. If the test is being conducted at the 5% level of significance, the null hypothesis

a. could be rejected or not rejected depending on the sample size.

b. could be rejected or not rejected depending on the sample mean.

c. is rejected.

d. is not rejected.

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Related Questions

HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP PLAASE Kiran stakes his kite into the ground. The kite is on a string that is 18 ft long and makes a 30 degree angle with the ground. How high is the kite? Explain or show your thinking by filling in the spots below.

Answers

Answer:

blank1: 9

blank2: 30°

blank3: 60°

blank4: 90°

blank5: half

Step-by-step explanation:

The 30°-60°-90° triangle has some great shortcuts associated with it (there are math reasons, trig reasons for these shortcuts)

One of these great shortcuts is that the short leg is half the hypotenuse (or the hypotenuse is double the short leg)

For your question, the kite string, 18ft, is the hypotenuse. The kite height is half that--9ft.

see image.

increase 15/16 by 3/4 of it. then increase the result by 3/5 of it

Answers

Increasing [tex]\frac{15}{16}[/tex] by [tex]\frac{3}{4}[/tex] of it and then increasing the result by [tex]\frac{3}{5}[/tex] of it gives us the fraction of [tex]\frac{45}{32}[/tex].

To increase [tex]\frac{15}{16}[/tex] by [tex]\frac{3}{4}[/tex] of it, we can multiply [tex]\frac{15}{16}[/tex] by [tex]\frac{3}{4}[/tex], which gives us:

[tex]\frac{15}{16}[/tex] × [tex]\frac{3}{4}[/tex] = [tex]\frac{45}{64}[/tex]

Adding this result to [tex]\frac{15}{16}[/tex], we get:

[tex]\frac{15}{16}[/tex] + [tex]\frac{45}{64}[/tex] = [tex]\frac{225}{256}[/tex]

Now, to increase this result by [tex]\frac{3}{5}[/tex] of it, we can multiply [tex]\frac{225}{256}[/tex] by 3/5, which gives us:

[tex]\frac{225}{256}[/tex] × [tex]\frac{3}{5}[/tex] = [tex]\frac{135}{256}[/tex]

Adding this result to [tex]\frac{225}{256}[/tex], we get the final answer:

[tex]\frac{225}{256}[/tex] + [tex]\frac{135}{256}[/tex] = [tex]\frac{360}{256}[/tex]

Simplifying this fraction, we get:

[tex]\frac{360}{256}[/tex] = [tex]\frac{45}{32}[/tex]

The problem involves increasing a fraction by a certain percentage twice. To solve the problem, we first find the increase in the fraction by multiplying it with the given percentage. We then add the result to the original fraction to get the new fraction. This process is repeated for the second increase. Finally, we simplify the resulting fraction if possible. In this specific problem, we are increasing [tex]\frac{15}{16}[/tex] by [tex]\frac{3}{4}[/tex] of it and then increasing the result by [tex]\frac{3}{5}[/tex] of it to find the resulting fraction [tex]\frac{45}{32}[/tex].

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Solve y3 = 1.
y = −1
y = 1
y = ±1
y = 3

Answers

The answer is y = ±1, as well as two complex solutions. The answer y = 3 is not a solution to the equation [tex]y^3 = 1.[/tex]

What is equation?

An equation is a statement that asserts the equality of two expressions. It typically contains one or more variables, which are symbols that represent unknown or varying quantities. The expressions on either side of the equals sign can include numbers, constants, functions, and other mathematical operations.

To solve[tex]y^3 = 1[/tex], we can take the cube root of both sides of the equation:

y = ∛1

There are three cube roots of 1, which are 1, -1/2 + √3/2 i, and -1/2 - √3/2 i, where i is the imaginary unit. These three roots form a complex conjugate pair.

Therefore, the solutions to the equation [tex]y^3 = 1[/tex] are:

y = 1

y = -1/2 + √3/2 i

y = -1/2 - √3/2 i

So the answer is y = ±1, as well as two complex solutions. The answer y = 3 is not a solution to the equation [tex]y^3 = 1.[/tex]

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If there is a 60% chance of rain each day this week, which simulation tool(s) could be used to find the experimental probability that it will take at least three days before it rains?
random number list
coin
die
colored discs​

Answers

Answer:

A random number list could be used to simulate the probability of rain each day this week. For example, we could assign the numbers 1-60 to the days where rain is expected and the numbers 61-100 to the days where it is not expected. Then, we could use a random number generator to simulate each day and count how many days it takes until it rains for the first time. By repeating this simulation many times and taking the average, we could estimate the experimental probability of it taking at least three days before it rains.

There are two boxes containing only white and green pens. Box A has 3 green pens and 12 white pens. Box B has 6 green pens and 2 white pens. A pen is randomly chosen from each box. List these events from least likely to most likely. Event 1: choosing a green or white pen from Box B. Event 2: choosing a white pen from Box B. Event 3: choosing a blue pen from Box A. Event 4: choosing a green pen from Box A. Least likely Event, Event, Event, Most likely Event​

Answers

The events ranked from least likely to most likely are:

Event 3: Choosing a blue pen from Box AEvent 2: Choosing a white pen from Box BEvent 4: Choosing a green pen from Box AEvent 1: Choosing a green or white pen from Box B

What is probability?

Probability refers to potential. A random event's occurrence is the subject of this area of mathematics. The range of the value is 0 to 1. Mathematics has incorporated probability to forecast the likelihood of various events.

To rank the events from least likely to most likely, we need to consider the probability of each event occurring.

Event 3: Choosing a blue pen from Box A

This event is the least likely because there are no blue pens in Box A. The probability of choosing a blue pen is 0.

Event 2: Choosing a white pen from Box B

This event is more likely than Event 3 because there are white pens in Box B. The probability of choosing a white pen from Box B is 2/8 or 1/4.

Event 4: Choosing a green pen from Box A

This event is more likely than Event 2 because there are green pens in Box A. The probability of choosing a green pen from Box A is 3/15 or 1/5.

Event 1: Choosing a green or white pen from Box B

This event is the most likely because it includes both a green and a white pen in Box B. The probability of choosing a green or white pen from Box B is 6/8 or 3/4.

Therefore, the events ranked from least likely to most likely are:

Event 3: Choosing a blue pen from Box A

Event 2: Choosing a white pen from Box B

Event 4: Choosing a green pen from Box A

Event 1: Choosing a green or white pen from Box B

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please help will give brainliest

Answers

Answer:

Option D is the correct answer

D. f(n) = 95 + 60(n - 1)

Step-by-step explanation:

Solution:

f(n) = installation charges + monthly fees x number of months

-> f(n) = 35 + 60*n

-> f(n) = 35 + 60*n + 60 - 60 (Add and subtract 60)

-> f(n) = (35 + 60) + (60*n - 60)

-> f(n) = 95 + 60(n - 1)

I need help with this question it’s algebra 2 .

Answers

The true statements are:

C) -5 is a solution to f(x).

E) f(x) = 2x^2 + 9x - 5

F) 0 is a solution to f(x).

I) 5 is a solution to f(x).

K) -3 is a solution to f(x).

L) (-5,0) is an x-intercept of f(x).

How do we calculate?

From the given factors of f(x), we know that:

f(x) = 3 * (2x-1) * (x+5)

Using the  information, we can calculate  the  statements are true:

A) 1 is a solution to f(x).

Not necessarily true. We need to substitute x=1 into the expression for f(x) to check if it equals zero.

B) f(x) = 6x^2 - 33x - 15

Not true. The correct expression for f(x) is given above.

C) -5 is a solution to f(x).

True. Substituting x=-5 into f(x) gives us: f(-5) = 3*(-11)*0 = 0.

D) 3 is a solution to f(x).

Not necessarily true. We need to substitute x=3 into the expression for f(x) to check if it equals zero.

E) f(x) = 2x^2 + 9x - 5

True. This is the expanded form of f(x) using the given factors.

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the ruler shows a 7 inch segment divided into 2 equal parts.What is the length of one of those part

Answers

Answer:

the ruler showed 7 inch segment

Step-by-step explanation:

have an amazing weekend

Answer:

7÷2= 3.5

Step-by-step explanation:

The length of each part is 3.5

Which equation represents the general form a circle with a center at (â€"2, â€"3) and a diameter of 8 units? x2 y2 4x 6y â€" 51 = 0 x² y² â€" 4x â€" 6y â€" 51 = 0 x2 y2 4x 6y â€" 3 = 0 x2 y2 â€" 4x â€" 6y â€" 3 = 0

Answers

x² + y² + 4x + 6y - 3 = 0  equation represents the general form a circle with a center at (â€"2, â€"3) and a diameter of 8 units.

The equation of a circle with center (h, k) and radius r can be written in the form (x - h)² + (y - k)² = r².

Given a center of (-2, -3) and a diameter of 8 units, first find the radius, which is half of the diameter:
r = 8 / 2 = 4
Now, substitute the center coordinates and radius into the equation:
(x - (-2))² + (y - (-3))² = 4²
(x + 2)² + (y + 3)² = 16
Now, expand the equation to get the general form:
(x² + 4x + 4) + (y² + 6y + 9) = 16
x² + 4x + y² + 6y + 4 + 9 - 16 = 0
Combine like terms to get the final equation:
x² + y² + 4x + 6y - 3 = 0

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There are 78 Year 9 pupils in a music club, out of a total of 167 pupils.


Write this proportion as a percentage.
Give your answer correct to 1 decimal place when appropriate.

Answers

The proportion of Year 9 pupils in the music club is approximately 46.7%.

A ratio or value that may be stated as a fraction of 100 is called a percentage.

To find the proportion of Year 9 pupils in the music club as a percentage, follow these steps:

To get proportion as a percentage divied number of Year 9 pupils by total pupils multiplied by 100.

Proportion as a percentage = [tex]\frac{Year \:9 \:pupils}{total \:pupils} \times 100[/tex]
Divide the number of Year 9 pupils by the total number of pupils.

78 (Year 9 pupils) ÷ 167 (total pupils)

= 0.4671
Multiply the result by 100 to convert the proportion to a percentage.
0.4671 × 100

= 46.71%.

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PLS HELP ASAP
MAKE A NUMBER LINE AND MARK ALL THE POINTS

Answers

A number line that represent the values of x is shown in the graph attached below.

What is a number line?

In Mathematics and Geometry, a number line simply refers to a type of graph with a graduated straight line which comprises both positive and negative numbers that are placed at equal intervals along its length.

This ultimately implies that, a number line primarily increases in numerical value towards the right from zero (0) and decreases in numerical value towards the left from zero (0):

x < - 1 or x > 1

-1 > x > 1

-3 < x ≤ 1

-5 ≤ x ≤ 0

In this scenario and exercise, we would use an online graphing calculator to plot each of the inequality as shown in the graph (number line) attached below.

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need help asap thank youuu

Answers

Answer:

11/3

Step-by-step explanation:

2[tex]\frac{1}{5}[/tex] = 11/5

2[tex]\frac{1}{5}[/tex] ÷ [tex]\frac{3}{5}[/tex] = 11/5 · 5/3 = 55/15 = 11/3

PART A: A can of cat food measures 1" tall and a diameter of 3.5". What is the volume of cat food in the can? To solve Give your answer in cubic inches. Round to the nearest hundredth.

PART B: Cat food is sold by ounces (weight).
If the can holds 5.8 ounces, write a ratio to show cubic inches (your answer from slide 3) to ounces.

Answers

The volume of cat food in the can is approximately 9.63 cubic inches.

What is the volume of a cylinder?

The volume of a cylinder can be found using the formula:

V = πr²h

where V is the volume, r is the radius of the circular base, h is the height of the cylinder, and π is the constant pi (approximately equal to 3.14).

To find the volume of the can of cat food, we can use the formula for the volume of a cylinder, which is V = πr²h, where r is the radius (half the diameter) and h is the height.

The radius of the can is 3.5/2 = 1.75 inches, and the height is 1 inch. So, the volume of the can is:

V = π(1.75)²(1)

= 9.62 cubic inches

≈ 9.63 cubic inches (rounded to the nearest hundredth)

Therefore, the volume of cat food in the can is approximately 9.63 cubic inches.

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What is the image point of (-2, 10) after the transformation R270° 0 D₁?

Answers

The transformation R270° 0 D₁ means a counterclockwise rotation of 270 degrees about the origin, followed by a reflection in the x-axis.

To find the image point of (-2, 10) under this transformation, we can apply each step of the transformation in turn.

Rotation of 270 degrees counterclockwise about the origin:
The point (-2, 10) will rotate counterclockwise by 270 degrees to a new point. To perform this rotation, we can switch the x and y coordinates of the point, and negate the new x-coordinate. Thus, the rotated point will be (10, 2).
Reflection in the x-axis:
The point (10, 2) will reflect across the x-axis. To perform this reflection, we simply negate the y-coordinate of the point. Thus, the reflected point will be (10, -2).
Therefore, the image point of (-2, 10) after the transformation R270° 0 D₁ is (10, -2).

6 less than a number raised to the fifth power

Answers

Answer:

let n be the number

6 less than the number

= (n-6)^5 = 32

(n-6)^5 = 2^5

since powers are equal we equate the bases

n-6 =2

n=8

A builder was building a fence. In the morning, he worked for 25 of an hour. In the afternoon, he worked for 910 of an hour. How many times as long as in the morning did he work in the afternoon?

Write a division equation to represent this situation, then answer the question. Use "?" to represent the unknown quantity. Do not use parentheses in your equation.

Answers

Answer:

36.4

Step-by-step explanation:

In morning, builder worked for = 25 in a hour.

Let hour be ? hr.

then 25? = Time he worked in morning.

In afternoon,he worked for= 910 of ? hour = 910? hr

Times he worked more = 910?/25? = 36.4 times

25*6 =

Can someone help me ASAP it’s due tomorrow. I will give brainliest if it’s all done correctly.

Answer all parts!!

Answers

Part A: Sample space of randomly selecting 2 lollipops with replacement:

{GG, GC, GL, CG, CC, CL, LG, LC, LL}

Part B: Sample space of randomly selecting 2 lollipops without replacement:

{GC, GL, CG, CL, LG, LC}

What is the experiment about!

The experiment of randomly selecting 2 lollipops without replacement shows dependent events because the probability of drawing the second lollipop depends on what the first lollipop was.

For example, if the first lollipop drawn is grape, then the probability of drawing another grape lollipop is decreased because there is only one left in the bag.

The experiment of randomly selecting 2 lollipops with replacement shows independent events because each lollipop can be chosen without affecting the probability of choosing the other lollipops.

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Factor 25z^2 - 81

ANSWER FAST WILL GIVE BRAINLIEST

Answers

Answer: B= (5z+9) (5z-9)

Step-by-step explanation:

Answer:

Step-by-step explanation:

Step 1: Use the sum-product pattern

25z² - 81 =

25z² + 45z - 45z - 81 =

Step 2: Common factor from the two pairs

(25z² + 45z) + (−45z − 81) =

Step 3: Rewrite in Factored Form

5z (5z + 9) − 9 (5z + 9) =

(5 - 9) (5 + 9)

Solution:

B: (5 + 9) (5 - 9)

5.66. what is the probability that an irs auditor will catch only 2 income tax returns with illegitimate deduc-tions if she randomly selects 5 returns from among 15 returns, of which 9 contain illegitimate deductions?

Answers

The probability that an irs auditor will catch only 2 income tax returns with illegitimate deduc-tions = 0.24

Let us assume that X be the number of returns containing illegitimate deductions in the sample.

Here, X has a hypergeometric distribution.

We need to find the probability that an IRS auditor will catch only 2 income tax returns with illegitimate deduc-tions.

Here, N = 15, r = 9, n = 5

So, P (X = 2) = (⁹C₂ × ⁶C₃) / (¹⁵C₅)

We know that the combination formula:

⁹C₂ = 9! / (2! × 7!)

     = 36

⁶C₃ = 6! / (3! × 3!)

     = 20

¹⁵C₅ = 15! / (5! 10!)

      = 3003

P (X = 2) = (⁹C₂ × ⁶C₃) / (¹⁵C₅)

              = (36 × 20) / (3003)

              = 0.24

Therefore, the required probability is: 0.24

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The Area of a Rectangle is 40. The width is 2 less than 3
times the length. Find the width.
O 10
O 12
O 15
O 14

Answers

Based on the above, the width of the rectangle is 10.

What is the width?

Let's use "w" to represent the width and "l" to represent the length of the rectangle.

From the problem, we know that the area of the rectangle is 40, so we can write:

Area = length × width

40 = l × w

We also know that the width is 2 less than 3 times the length, so we can write:

width = 3l - 2

Now we can substitute this expression for "w" in the equation for the area: 40 = l × (3l - 2)

Expanding the right side gives: 40 = 3l² - 2l

Rearranging and dividing by 2 gives:

3l²- 2l - 40 = 0

(3l + 10)(l - 4) = 0

Therefore, l = 4 (because the length cannot be negative), and we can find the width using the expression we found earlier:

width = 3l - 2

width = 3(4) - 2

width = 10

So the width of the rectangle is 10. Therefore, the answer is  10.

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Find the value of $x$ . Two segments start at a point outside the circle intersect the circle at two points that divide the segments. The length of the first segment is 45 units and length of the segment outside the circle is labeled x. The length of second segment is 50 units and length of the segment outside the circle is 27 units. $x\ =\ $

Answers

The value of x is 29.5 units. Since the segments inside the circle have the same length, we can set  52.5  - x = 23 and get the value of x.

What is radius?

It is half of the diameter of the circle. The radius is used to calculate the area of a circle and the length of an arc or a circular sector.

In order to find the value of x, we need to first determine the radius of the circle.

In this problem, the first shorter side is 45 units, and the second shorter side is 27 units. Thus, we can find the radius of the circle by using the following method,

Radius of the circle = √(45² + 27²)

= √(2754) = 52.5 units

Now that we know the radius of the circle, we can use this information to find the value of x. We know that the total length of the first segment is  52.5 units. This means that the length of the segment outside the circle is x units and the length of the segment inside the circle is 52.5  - x units.

Similarly, the total length of the second segment is 50 units, so the length of the segment outside the circle is 27 units and the length of the segment inside the circle is

50 - 27 = 23 units.

Since the segments inside the circle have the same length, we can set  52.5  - x = 23 and solve for x.

52.5  - x = 23

x =  52.5  - 23

x = 29.5 units

Therefore, the value of x is 29.5 units.

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I really need help with this

Answers

The dilated triangle has vertices

P' (-3, 2), Q' (1, 4), and R' (1, -2).

How to find the coordinates after dilation'

The coordinates of the vertex of the triangle before dillation is given as

P (-6, 4 )

Q (2, 8)

R (2, -4)

To dilate a figure by a scale factor of 1/2, we need to multiply the coordinates of each point by 1/2.

The coordinates of P are (-6, 4). Multiplying by 1/2, we get:

(-6 * 1/2, 4 * 1/2) = (-3, 2)

The coordinates of Q are (2, 8). Multiplying by 1/2, we get:

(2 * 1/2, 8 * 1/2) = (1, 4)

The coordinates of R are (2, -4). Multiplying by 1/2, we get:

(2 * 1/2, -4 * 1/2) = (1, -2)

Therefore, the dilated triangle has vertices P'(-3, 2), Q'(1, 4), and R'(1, -2).

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Find the perimeter of the figure (use 3.14 as pi if u can)

Answers

Answer:

b

Step-by-step explanation:

just add then then after you add 27=27 multiply it by 2

Help!! Brandon wants to cut 12 pieces of old rubber in the size shown to make a patio mat. How much rubber will Brandon need for 12triangukar pieces?

Answers

Step-by-step explanation:

The area of a right triangle like this is   area = 1/2 * base * height

   base and height are the LEGS of the right triangle

  this one pictured piece area is:        1/2 * 14 in  * 11 in = 77 in^2

    He needs 12 of them ....so total is then   12 * 77 in^2 = 924 in^2 needed

   

an article marked at rs.8,000 is sold at rs6689.60 allowing some discount and adding vat.8f the rate of discount was double then the rate of vat, find the selling price of the article without vat

Answers

The selling price of the article without VAT is Rs. 6,429.13.

What is Algebraic expression ?

In mathematics, an algebraic expression is a combination of variables, constants, and mathematical operations, such as addition, subtraction, multiplication, and division, that represents a quantity or a relationship between quantities.

Let's assume the rate of discount to be 'x' and the rate of VAT to be 'y'.

According to the problem, the marked price of the article is Rs. 8,000.

After applying the discount, the selling price becomes:

Selling price = Marked price - Discount

Selling price = 8000 - (x÷100) * 8000

Now, we add the VAT to the selling price:

Selling price with VAT = Selling price + (y÷100) * Selling price

Selling price with VAT = [8000 - (x÷100) * 8000] + [(y÷100) * (8000 - (x÷100) * 8000)]

Selling price with VAT = 6689.60 (Given)

We are also given that the rate of discount was double the rate of VAT, i.e.,

x = 2y

Substituting this value in the above equation, we get:

6689.60 = [8000 - (2y÷100) * 8000] + [(y÷100) * (8000 - (2y÷100) * 8000)]

Simplifying this equation, we get:

6689.60 = 8000 * [1 - (2y÷100) + (y÷100) - (2y÷100) * (y÷100)]

6689.60 = 8000 * [1 - (3y÷50) + (y*y÷5000)]

Solving for y, we get:

y = 4

Now, we can calculate the selling price without VAT as follows:

Selling price without VAT = Selling price - (y÷100) * Selling price

Selling price without VAT = 6689.60 - (4÷100) * 6689.60

Selling price without VAT = Rs. 6,429.13

Therefore, the selling price of the article without VAT is Rs. 6,429.13.

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In ΔJKL, the measure of ∠L=90°, KJ = 41, JL = 40, and LK = 9. What ratio represents the cosine of ∠J?

Answers

Given:

[tex]\angle\text{L}=90^\circ[/tex]

[tex]\text{KJ}=41[/tex]

 [tex]\text{JL}=40[/tex]

  [tex]\text{LK}=9[/tex]

To find the cosine of angle J

By using cosine ratio,

[tex]\text{cos J}=\dfrac{\text{adjacent side}}{\text{hypotenuse}}[/tex]

       [tex]\text{cos J}=\dfrac{\text{JL}}{\text{JK}}[/tex]

         [tex]\text{cos J}=\dfrac{\text{40}}{\text{41}}[/tex]

The ratio of cosine of angle J is 40/41.

A farmer wants to estimate the number of moles in a local area she catches and tags 30 moles, then releases them back into the local area a few days later the farmer catches another sample of the miles and finds that half of them have a tag estimate the total number of moles in the local area

Answers

The estimated total number of moles in the local area is 4.

The farmer needs to use the capture-recapture method to estimate the total number of moles in the local area. This involves tagging a population sample, releasing them back into the population, and then capturing another sample to determine the proportion of tagged individuals in the second sample. Using this proportion, the total population can be estimated using the following formula:

total population = (number in first sample * number in the second sample) / number of tagged individuals in the second sample

In this case, the farmer tagged 30 moles in the first sample and found that half of the second sample had tags. We can use these values to estimate the total number of moles:

total population = (30 * 2) / 15

total population = 4

Note that the actual population size may be larger or smaller than this estimate due to factors such as migration, birth, and death rates.

To correctly estimate the number of moles in a substance, the farmer needs to use the grams to moles formula, which is:

n = m / M

where n is the number of moles, m is the mass of the substance in grams, and M is the molar mass in grams per mole . To calculate the molar mass of a substance, the farmer can sum the molar masses of its component atoms

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the time until recharge for batteryin a laptop computer under common conditions is normally distributed with mean of 275 minutes and standard deviation of 50 minutes. a) what is the probability that battery lasts more than four hours? round the answer to 3 decimal places b) what are the quartiles (the 25% and 75% values) of battery life? 25% value minutes (round the answer to the nearest integer) 75% value minutes (round the answer to the nearest integer:) c) what value of life in minutes is exceeded with 95% probability? integer:) (round the answer to the nearest

Answers

a) The probability that the battery lasts more than 4 hours is 0.758 (rounded to 3 decimal places).

b) The 25% value is 240 minutes, and the 75% value is 310 minutes.

c) The value of life in minutes that is exceeded with 95% probability is 357 minutes.

a) To find the probability that the battery lasts more than 4 hours (240 minutes), we first need to convert 240 minutes into a z-score.
z = (X - μ) / σ
z = (240 - 275) / 50
z = -0.7
Now, we'll use a z-table to find the probability that the battery lasts more than 4 hours:
P(Z > -0.7) = 1 - P(Z ≤ -0.7) = 1 - 0.2420 = 0.758
The probability that the battery lasts more than 4 hours is 0.758 (rounded to 3 decimal places).
b) To find the quartiles, we'll use the z-table to find the z-scores corresponding to 25% and 75%:
25%: z = -0.674
75%: z = 0.674
Now, we'll convert the z-scores back into minutes:
Q1 = μ + z * σ = 275 + (-0.674) * 50 = 240 (rounded to the nearest integer)
Q3 = μ + z * σ = 275 + (0.674) * 50 = 310 (rounded to the nearest integer)
The 25% value is 240 minutes, and the 75% value is 310 minutes.
c) To find the value of life in minutes that is exceeded with 95% probability, we first find the z-score corresponding to 95%:
95%: z = 1.645
Now, we'll convert the z-score back into minutes:
X = μ + z * σ = 275 + (1.645) * 50 = 357 (rounded to the nearest integer).

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Math for School: Practice & Problem Solving (LMS graded)
Challenge Abag contains pennies, nickels, dimes, and quarters. There are 50 coins in all of the coins, 10%
han pennies. There are 2 more nickels than pennies How much money does the bag contain?

Answers

The bag contains $4.60 in coins.

What are coins?

Let's use P, N, D, and Q to represent the number of pennies, nickels, dimes, and quarters, respectively, in the bag.

We know that the total number of coins is 50, so:

P + N + D + Q = 50

We also know that 10% of the coins are pennies, so:

P = 0.1(50)

P = 5

There are 2 more nickels than pennies, so:

N = P + 2

N = 5 + 2

N = 7

Now we can use this information to find the number of dimes and quarters. Since there are 50 coins in total, we can substitute the values we have found for P and N into the first equation:

P + N + D + Q = 50

5 + 7 + D + Q = 50

12 + D + Q = 50

D + Q = 38

We also know the values of P and N, so we can find the total value of all the coins in the bag:

Total value = (value of pennies) + (value of nickels) + (value of dimes) + (value of quarters)

Total value = (5 cents x 5) + (7 cents x 5) + (10 cents x D) + (25 cents x Q)

Total value = 25 + 35 + 10D + 25Q

We can substitute D + Q = 38 into this equation to get:

Total value = 25 + 35 + 10(D + Q)

Total value = 60 + 10(38)

Total value = 460 cents, or $4.60

Therefore, the bag contains $4.60 in coins.

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PLS HELP! (I need to finish this today because it was due yesterday!)

Answers

Answer:

Step-by-step explanation:

Search up the area of both. rectangle is LxW therefore the area is 18.  the other is trapezium therefore, ((a+b)xh)/2 therefore the area is 20. trapezium has larger area

Answer trapezoid has  greater area

Step-by-step explanation: rec: 6*3= 8,  trapezoid [ (6+2) * 5 ]1/2  = 20

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