2) The cost of building a bridge in 1995 was estimated as £24
million. When it was finally completed in 1998 its total cost
amounted to £37.7 million.
13.7
What was the percentage increase?

When skiing down a mountain with a vertical height of 1150 feet and a base-to-top distance of 2300 feet, the angle of elevation from the base to the top of the mountain is approximately 26.56 degrees.

When skiing down a mountain with a vertical height of 1150 feet and a base-to-top distance of 2300 feet, the angle of elevation from the base to the top of the mountain is given by tan⁻¹(1150/2300).

How to find the angle of elevation from the base to the top of the mountain?

The angle of elevation of an object from a point is the angle between the horizontal and the line of sight from the observer to the object above the horizontal. We can use the inverse tangent function to calculate this angle of elevation.

Step 1: Find the tangent of the angle of elevation: Let the height of the mountain be h and the distance from the base to the top of the mountain be d. Then tan(θ) = h/d.

Step 2: Inverse tangent of the height and distance of the mountain: Take the inverse tangent of the quotient to find the angle of elevation from the base to the top of the mountain. θ = tan⁻¹(h/d).Here, h = 1150 feet and d = 2300 feet. Substituting these values in the formula θ = tan⁻¹(1150/2300), we can find the angle of elevation from the base to the top of the mountain.θ = tan⁻¹(1150/2300) = 26.56 degrees.

So, the angle of elevation from the base to the top of the mountain is approximately 26.56 degrees.

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Coach A can make 120 free throws in 3 minutes for number of free throws that Coach A can make varies directly with the amount of times she spends shooting the baskets.

A mathematical connection when two variables are involved in which the ratio of their values is constant is known as direct variation. Alternatively said, if one variable is multiplied by a specific amount, the second variable will also be multiplied by the same value. The two variables in this connection may be represented as a percentage, where the constant of proportionality is the ratio of their values, and the two variables are on opposite sides of an equal sign.

Given that, she can make 20 baskets in 30 seconds.

Thus, using proportion we have:

Free throws / Time = Free throws per unit time

20 baskets / 30 seconds = 2/3 baskets per second

Now, for 3 minutes or 3(60)n= 180 seconds we have:

Free throws = Time x Free throws per unit time

Free throws = 180 seconds x (2/3 baskets per second)

Free throws = 120 baskets

Hence, Coach A can make 120 free throws in 3 minutes.

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Answer:

diameter= 70

circumference= 219.8

Step-by-step explanation:

to find the diameter, es the doble of radius

35×2=

to fine circumference

πd

3.14× diameter

Answer:

y = -2x.

Step-by-step explanation:

The slope-intercept form of the equation of a line is:

y = mx + b

where m is the slope of the line, and b is the y-intercept.

In this case, the slope is -2, and the y-intercept is 0. So we can substitute these values into the slope-intercept form of the equation:

y = (-2)x + 0

Simplifying, we get:

y = -2x

the equation of the line in slope-intercept form is y = -2x.

The height of the building is 87.5 feet.

To find the height of the building, we will use similar triangles.
1. Draw a diagram with a right triangle formed by the basketball player, the mirror, and the top of the building.

Label the height of the building as 'h', the distance between the mirror and the building as 100 ft, and the distance between the mirror and the basketball player as 8 ft.
2. Draw another right triangle formed by the basketball player, the mirror, and the ground. Label the height of the basketball player as 7 ft.
3. Since the two triangles are similar, we can write the following proportion:

(height of the building) / (distance between mirror and building) = (height of basketball player) / (distance between mirror and basketball player)
4. Plug in the values: h / 100 = 7 / 8
5. To solve for the height 'h', multiply both sides by 100: h = (7 / 8) * 100
6. Calculate the value of 'h': h = 87.5 ft
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The median of the given numbers is 2.5.

its formula and examples are explained. In Mathematics, the median is defined as the middle value of a sorted list of numbers. The middle number is found by ordering the numbers. The numbers are ordered in ascending order. Once the numbers are ordered, the middle number is called the median of the given data set.

Given, Number of states visited by the students in Luther's class are:

Luther - 2 states

Amelia - 5 states

Oliver - 2 states

Katie - 3 states

Emilio - 1 state

Joe - 0 states

Dustin - 0 states

Arranging these numbers in ascending order, we get:

0, 0, 1, 2, 2, 3, 5

The median is the middle number when the numbers are arranged in order.

As there are an odd number of numbers, there is only one number that is exactly in the middle, which is 2.

Therefore, the median of the given numbers is 2.5.

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The experimental probability of rolling the number 3 is approximately 0.2

Experimental probability is the ratio of the number of times an event occurs to the total number of trials or observations conducted in an experiment or a trial. It is an estimate of the probability of an event based on the actual outcome of a series of trials or experiments.

To find the experimental probability of rolling the number 3, we need to divide the number of times the number 3 occurred by the total number of rolls.

From the table, we can see that the number 3 occurred 45 times. The total number of rolls is

42 + 44 + 45 + 44 + 47 + 46 = 268

So, the experimental probability of rolling the number 3 is

45/268 = 0.168 (rounded to the nearest tenth)

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The given question is incomplete, the complete question is:

A class rolled number cubes. their results are shown in the table. what is the experimental probability of rolling the number 3? round your answer to the nearest tenth.

After four iterations of drawing and replacing balls, the probability that the urn contains three red and three blue balls is 1/3. so, the correct answer is D).

Let's consider the possible outcomes after each iteration of the process. We will use R and B to denote a red and blue ball, respectively.

After the first iteration, we have two possible outcomes:

R, R: The urn contains two red balls.

B, B: The urn contains two blue balls.

After the second iteration, we have four possible outcomes:

R, R, R, R: The urn contains four red balls.

R, R, B, B: The urn contains two red balls and two blue balls.

B, B, B, B: The urn contains four blue balls.

B, B, R, R: The urn contains two red balls and two blue balls.

After the third iteration, we have six possible outcomes:

R, R, R, R, R, R: The urn contains six red balls.

R, R, R, B, B, B: The urn contains three red balls and three blue balls.

R, R, B, B, R, R: The urn contains four red balls and two blue balls.

R, R, B, B, B, B: The urn contains three red balls and three blue balls.

B, B, B, B, B, B: The urn contains six blue balls.

B, B, R, R, B, B: The urn contains four blue balls and two red balls.

After the fourth iteration, we have six possible outcomes, one for each of the outcomes after the third iteration. In particular, we are interested in the outcomes where the urn contains three red balls and three blue balls, which occur in two of the six outcomes.

Therefore, the probability that the urn contains three balls of each color after the four iterations is 2/6 = 1/3, which is answer choice (d).

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--The given question is incorrect, the correct question is given

" an urn contains one red ball and one blue ball. a box of extra red and blue balls lie nearby. george performs the following operation four times: he draws a ball from the urn at random and then takes a ball of the same color from the box and returns those two matching balls to the urn. after the four iterations the urn contains six balls. what is the probability that the urn contains three balls of each color?(2020amc10b problem 18) (a) 16 (b) 1/5 (c) 1/4 (d) 1/3 (e) 12 "--

Answer:

100

Step-by-step explanation:

its impossable

The new volume of the cylinder is $100$ cubic feet.

Let the original radius and height of the cylinder be $r$ and $h$, respectively. Therefore, the original volume of the cylinder is given by $\pi r^2 h = 100$. After the radius decreases by $10%$ and the height increases by $10%$, the new radius and height become $0.9r$ and $1.1h$, respectively. The new volume of the cylinder can be calculated as $\pi (0.9r)^2 (1.1h) = 0.891\pi r^2 h$. Since $0.891\pi r^2 h = 100$, the new volume of the cylinder is $100$ cubic feet.

Therefore, the new volume of the cylinder is the same as the original volume, i.e., $100$ cubic fee

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The sequence's eighth partial total, then, is zero.

A series is a collection of things that is in order in mathematics. (or events). Similar to a group, it has individuals. (also called elements, or terms). The total length of the series is the number in ordered components (possibly endless).

The sequence is: 24, -24, 24, -24, ...

To find the 8th partial sum, we need to add the first 8 terms of the sequence.

S8 = 24 + (-24) + 24 + (-24) + 24 + (-24) + 24 + (-24)

Simplifying this expression, we see that every pair of adjacent terms cancels each other out, leaving us with:

S8 = 0 + 0 + 0 + 0

Therefore, the 8th partial sum of the sequence is 0.

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The coefficient of [tex]x^{2}[/tex] in binomial expansion is 0

option is d .0

A binomial expansion is a method for expanding and simplifying algebraic statements of the type [tex](x+y)^{n}[/tex] into sum of terms of the form [tex]ax^{b} y^{c}[/tex].

An equation is a statement that determines the equivalence of two expressions joined by the equals sign "=". For instance, 5x - 9 = 10.

5x - 9 and 10 are expressions in this case. "=" is the sign that connects these two expressions.

According to the given information:

Given expanding term is [tex](2x+\frac{3}{x^{3} } )^{8}[/tex]

On cross multiplying and separating power numerator and denominator we get, [tex]\frac{(2x^{4} +3)^{8} }{(x^{3} )^{8} }[/tex]

Expanding the numerator we get [tex]256x^{32}+3072x^{28} +16128x^{24}+48384x^{20} +90720x^{16}+10884x^{12}+81648\\ x^{8}+34992x^{4}+6561[/tex]

Here there is no [tex]x^{2}[/tex],So co efficient of it is 0

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The points that are in the solution set are (-1, -1) and (2, -1).

In order to determine which ordered pairs are valid and true solutions based on the given linear inequalities, we would have to test the given ordered pairs by substituting their values into each of the linear inequality as follows;

For ordered pair (0, 0), we have:

y ≤ -1

0 ≤ -1 (False).

For ordered pair (0, 0), we have:

3x + 4y < 4

3(0) + 4(0) < 4

0 < 4 (True)

For ordered pair (-1, -1), we have:

y ≤ -1

-1 ≤ -1 (True).

For ordered pair (-1, -1), we have:

3x + 4y < 4

3(-1) + 4(-1) < 4

-7 < 4 (True).

For ordered pair (2, -1), we have:

y ≤ -1

-1 ≤ -1 (True).

For ordered pair (2, -1), we have:

3x + 4y < 4

3(2) + 4(-1) < 4

-2 < 4 (True).

For ordered pair (-2, 2), we have:

y ≤ -1

2 ≤ -1 (False).

For ordered pair (-2, 2), we have:

3x + 4y < 4

3(-2) + 4(2) < 4

-6 + 8 < 4

2 < 4 (True).

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1.a) The total revenue received for CD sales was $12,090,000.

1.b) The total revenue received for downloads was $2,499,000.

1.c) The total amount that Craze-K received in royalties last year was $1,240,065.

2) The total royalties that Mr. Pambruccian received last year were $45,210.01.

Commission = 8.5%

                                               CDs         Downloads      Total

Number of items sold     1.86 million      2.1 million

Selling price per unit       $6.50             $1.19

Total sales revenue      $12,090,000   $2,499,000   $14,5898,000

                                  (1.86 m x $6.50)  (2.1 m x $1.19)

Sales commission =      $1,027,650      $212,415        $1,240,065

Royalties = 4%

Selling price per book = $45.99

The total number of books sold = 24,576

The total revenue (sales) = $1,130,250,24 (24,576 x $45.99)

Royalties received = $45,210.01 ($1,130,250.24 x 4%)

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Step-by-step explanation: To find the cost of one taco, we can use a system of equations. Let x be the cost of one burger and y be the cost of one taco. Then we have:

2x + 4y = 22.50 x + 3y = 14.50

Multiplying the second equation by -2, we get:

-2x - 6y = -29 2x + 4y = 22.50

Adding the two equations, we get:

-2y = -6.50 y = 3.25

So one taco costs $3.25.

The probability that Joe will be accepted at one, and only one, the university is E. 0.45.

The probability that Joe will be accepted at one, and only one, university can be calculated using the following approach. First, we need to find the probability of Joe being accepted at each university individually and the probability of him not being accepted at each university. The acceptance rate for applicants with similar qualifications is 25 percent for University A and 40 percent for University B.

Let's use the following notations:

P(A) - probability of being accepted at University A

P(B) - probability of being accepted at University B

P(A') - probability of not being accepted at University A

P(B') - probability of not being accepted at University B

We are given:

P(A) = 0.25

P(B) = 0.40

To find the probability of not being accepted, we subtract the probability of being accepted from 1:

P(A') = 1 - P(A) = 1 - 0.25 = 0.75

P(B') = 1 - P(B) = 1 - 0.40 = 0.60

Now, we want to find the probability of Joe being accepted at one university and not at the other. There are two possibilities:

(1) he gets accepted at University A and not at University B or

(2) he gets accepted at University B and not at University A.

We can use the multiplication rule for independent events and the addition rule for mutually exclusive events to calculate this probability:

P(A and B') + P(A' and B)=

P(A) * P(B') + P(A') * P(B) =

(0.25 * 0.60) + (0.75 * 0.40) =

0.15 + 0.30 = 0.45

So, the probability that Joe will be accepted at one, and only one, university is 0.45. Therefore, the correct option is E. 0.45.

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As a result, the percentage decrease in her new monthly payment is 18.1%. (to the nearest tenth).

To begin, we must determine the original loan amount. Using the information provided, we can construct the following equation:

$55,000 = P(1 + 0.10)^4

P denotes the original loan amount.

When we solve for P, we get:

P = $38,574.09

The old monthly payment is calculated as follows:

$38,574.09 / 1000 x $9.66 = $372.64

We must now compute the new loan amount. Because Sally renewed her mortgage at a 12% interest rate, we can apply the same formula as before, but with a new time period of 16 years (since 4 years have already passed):

Now, we need to calculate the new loan amount. Since Sally renewed the mortgage at a 12% interest rate, we can use the same formula as before, but with a new time period of 16 years (since 4 years have already passed):

$55,000 = P(1 + 0.12)^16

Solving for P, we get:

P = $27,703.25

The new monthly payment can be calculated as:

$27,703.25 / 1000 x $11.02 = $305.23

To find the percent increase, we can use the following formula:

percent increase = ((new value - old value) / old value) x 100

Plugging in the values, we get:

percent increase = (($305.23 - $372.64) / $372.64) x 100 = -18.1%

So the percent of decrease in her new monthly payment is 18.1% (to the nearest tenth).

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Answer:

Step-by-step explanation:

mass=density* volume

78.12

The value of π can be found by dividing the circumference of a circle by twice its radius . [tex]\pi =c/2r[/tex]

Starting with the equation: the circumference of circle is

C = 2πr

We can isolate π on one side of the equation by dividing both sides by 2r:

C / (2r) = π

So the solution for π is:

π = C / (2r)

The circumference of a circle is the distance around its outer edge. It is calculated by multiplying the diameter of the circle by pi (π), which is a mathematical constant that represents the ratio of the circumference of a circle to its diameter. Therefore, the formula for the circumference of a circle is C = πd, where C is the circumference, d is the diameter, and π is approximately equal to 3.14. The circumference is an important measurement in geometry and is used to calculate the perimeter of circles.

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To put the equation 3y - 9x = -6 into slope-intercept form, we need to isolate y on one side of the equation.

First, we will add 9x to both sides:

3y - 9x + 9x = 9x - 6

Simplifying the left side of the equation:

3y = 9x - 6

Next, we will divide both sides by 3:

y = 3x - 2

This is the equation in slope-intercept form, where the slope is 3 and the y-intercept is -2.

If the expected counts are less than 5, then the chi-square test cannot be performed.

To perform the appropriate chi-square test using the data from this study, the following conditions must be satisfied:

i. The population distribution is approximately normal.

ii. The treatments were randomly assigned.

iii. The expected counts are all at least 5.

The chi-square test is a statistical method that examines whether observed data matches with the expected data.

The chi-square test is used to compare the categorical data between two or more groups. It is a non-parametric test of the statistical hypothesis.

In order to perform the appropriate chi-square test using the data from this study, the following conditions must be satisfied:

1. The population distribution is approximately normal: This means that the population data should be distributed normally. The normal distribution should be checked using a normal probability plot, which shows the data points relative to the standard normal distribution curve.

If the data is not normally distributed, then the chi-square test cannot be performed.

2. The treatments were randomly assigned: The treatments should be randomly assigned to the study participants in order to ensure that the results are not biased.

If the treatments are not randomly assigned, then the chi-square test cannot be performed.

3. The expected counts are all at least

4: The expected counts for each category should be at least

5. This means that there should be a sufficient number of observations in each category. If the expected counts are less than 5, then the chi-square test cannot be performed.

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to the nearest whole percent, the percentage yield is 13%.

What is the percentage?

A percentage that represents a tenth of a quantity. One percent, denoted by the symbol 1%, is equal to one-hundredth of something; hence, 100 percent denotes the full thing, and 200 percent designates twice the amount specified. A portion per hundred is what the percentage denotes. The percentage refers to one in a hundred. The % sign is used to denote it.

The percentage yield of a stock is calculated as follows:

Percentage Yield = (Annual Dividend / Stock Price) x 100%

Substituting the given values, we get:

Percentage Yield = (0.68 / 5.07) x 100% = 13.43%

Hence, to the nearest whole percent, the percentage yield is 13%.

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The probability of the outcome being a red counter, or a blue counter is equal, therefore Trevor is wrong.

We know that Trevor has a bag of counters with 26 red counters and 26 blue counters and that he has already randomly picked one red counter 5 times but he places them back in the bag again and mixes them, but he thinks that the next counter he picks has a greater probability of being blue than red.

Trevor is wrong as we know that the likelihood of an occurrence is denoted by a numerical value known as probability. This value falls between 0 and 1 or can be represented as a percentage between 0% and 100%. The higher the probability of an event, the greater the chances of its occurrence. An impossible event has a probability of 0, while a certain event has a probability of 1.

To calculate probability, divide the number of ways the event can occur by the total number of outcomes.

Here the probability of the outcome being a red counter or a blue counter is equal, therefore Trevor is wrong.

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The pοpulatiοn οf bacteria will be apprοximately 104,320 bacteria 1,705 minutes frοm nοw.

Expοnential grοwth is a type οf grοwth in which a quantity increases at a rate prοpοrtiοnal tο its current value.

Tο sοlve the prοblem, we can use the fοrmula fοr expοnential grοwth, which is:

N = N₀ * [tex]2^{(t/d)[/tex]

where:

N₀ = initial pοpulatiοn

N = final pοpulatiοn

t = time elapsed

d = dοubling time

In this case, the dοubling time is 341 minutes. Sο, we can plug in the given values and sοlve fοr N:

[tex]N = 1630 * 2^{(1705/341)[/tex]

N ≈ 104,320

Therefοre, the pοpulatiοn οf bacteria will be apprοximately 104,320 bacteria 1,705 minutes frοm nοw.

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The probability in question is a right-tail probability because it is asking for the probability that the mean bond percent for the sample will be at least 28 percent, which is greater than the mean of 26.9 percent.

To calculate the probability, first find the z-score:
z = (sample mean - population mean) / (population standard deviation / sqrt(sample size))
z =[tex] (28 - 26.9) / (3.6 / sqrt(35))[/tex]
z = [tex] 1.1 / (3.6 / 5.916)[/tex]
z =[tex]  1.1 / 0.608[/tex]
z ≈ [tex] 1.809[/tex]

Using the z-table, the area to the left of this z-score is 0.965. Since we are looking for the right-tail probability, we need to subtract this value from 1:
Probability = 1 - 0.965
Probability ≈ 0.035

Thus, the probability that the mean bond percent for the sample will be at least 28 percent is approximately 0.035. The correct answers are right-tail probability and 0.035.

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If Clare streams a classical music station while doing chores, then probability that next piece will be a concerto is 2/11.

In order to calculate the probability that the next-piece Clare listens to will be a concerto, we count the number of concertos in the list of pieces she has already listened to and divide by the total number of pieces.

From the given list,

The total number of pieces of music = 11;

The number of concerto is = 2;

So, probability that next piece Clare listens to will be a concerto is:

⇒ P(concerto) = (number of concertos)/(total number of pieces);

⇒ 2/11

Therefore, the required probability is 2/11.

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The given question is incomplete, the complete question is

Clare streams a classical music station while she's doing chores on the weekends. here are the types of musical pieces she has listened to so far this weekend :

{overture, symphony, sonata, concerto, symphony, sonata, overture, symphony, opera, sonata, concerto}

Based on the data, What is the probability that the next piece Clare listens to will be a concerto?

In order to determine the volume of a solid of revolution revolving around an axis that is alternatively the x or y-axis, the technique of cylindrical shells can be employed.

The general steps for doing this are as follows:

First, recognizing the area to revolve and the central axis must take place.

Second, an expression for the distance from the pivotal point to every single point within the region should be established; let us denote this distance as 'r'.

Then, discovering the measurement of each individual cylindrical shell can also be necessary by obtaining the distinction between two separate vertical points within the region; we shall refer to this tallest height identified as 'h.'

Lastly, setting up an integral expression for the volume of every encompassing cylindrical shell can bring forth more specific results.

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Answer:

the answer is y=6x-6

Step-by-step explanation:

hope this helps

Answer: y = 6x-6

Step-by-step explanation:

The circumference of the circle is approximately 31.42 cm and the area of the circle is approximately 157.08 cm².

A circle circumscribed about a square with sides of 10cm has a circumference of approximately 31.42 cm and an area of approximately 157.08 cm².

If a circle is circumscribed about a square, the diameter of the circle is equal to the diagonal of the square. In this case, the diagonal of the square is:

d = √(10² + 10²) = √(200) = 10√(2) cm

The radius of the circle is half the diameter, so:

r = 5√(2) cm

The circumference of the circle is:

C = 2πr = 10π√(2) cm

The area of the circle is:

A = πr² = 50π cm²

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The range of a set of numbers measures the spread or dispersion of the values in the set, and in the given set of numbers, the range is 4.1.

The range of a set of numbers is the difference between the largest and smallest numbers in the set.

The range can be a useful measure of the variability of a dataset, as it can tell us if the values are tightly clustered or widely spread out. However, the range can be influenced by extreme values, also known as outliers, which can distort the measure.

In the given set of numbers:

9, 6.9, 8.1, 7, 7.9, 7.1, 9, 7.6, 4.9

The largest number is 9, and the smallest number is 4.9.

So, the range is:

9 - 4.9 = 4.1

Therefore, the range of the given set of numbers is 4.1.

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