please help with these 2 questions in math

It switches between negative and positive every 40 seconds.  it switches between positive and negative every 80 seconds. So correct statements are B and E.

Mathematics' branch of algebra deals with symbols and the formulas used to manipulate them. It is an effective tool for dealing with issues involving mathematical expressions and equations. In algebra, variables—which are typically represented by letters—are used to represent unknowable or variable quantities.

Equations represent mathematical relationships between variables in algebra. An equation is made up of two expressions, one on either side of an equal sign, separated by an equation. Algebraic expressions can involve constants, variables, and mathematical operations such as addition, subtraction, multiplication, and division.

As we can see from the first roller coaster's graph, Michael's height changes from positive to negative after 40 seconds, whereas it was positive for the first 40. It remains negative between 40 and 80 seconds. It continues to be positive from 80 to 120, and so forth.

As a result, every 40 seconds it alternates between negative and positive.

B is accurate.

We can see from the second roller coaster's table that it stays positive from 0 to 80. It continues to be negative from 80 to 160, and so forth.

As a result, every 80 seconds it alternates between positive and negative.

E is accurate.

The complete question is:

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To find the speed of the car, we need to use the formula:

speed = (RPM * tire diameter * pi * gear ratio) / (336 * 12)

where:

RPM is the engine speed in revolutions per minute

tire diameter is the diameter of the tires in inches

pi is the mathematical constant pi (approximately 3.14)

gear ratio is the ratio of the number of teeth on the driven gear to the number of teeth on the driving gear

336 is a constant representing the number of inches per minute that a car will travel at 1 mile per hour

12 is a constant representing the number of inches in a foot

Plugging in the given values, we get:

speed = (2690 * 27 * 3.14 * 3.2) / (336 * 12)

simplifying the equation, we get:

speed = 63.8 mph (rounded to one decimal place)

Therefore, the car will travel at a speed of approximately 63.8 miles per hour

the organization needs to sell at least 22 tickets to break even.

What is the arithmetic operation?

The four fundamental operations of arithmetic are addition, subtraction, multiplication, and division of two or more quantities. Included in them is the study of numbers, especially the order of operations, which is important for all other areas of mathematics, including algebra, data management, and geometry. The rules of arithmetic operations are required in order to answer the problem.

Let C be the total production cost and n be the number of tickets sold.

From the problem, we know that the organization had a net loss of $800 after selling 10 tickets, so we have:

10(70) - C = -800

Simplifying, we get:

C = 1500

This means that the total production cost was $1500.

The revenue from selling n tickets at $70 per ticket is given by:

R = 70n

Substituting the values of R and C, we get:

70n = 1500

Solving for n, we get:

n = 1500/70 = 21.43

Since we can't sell a fraction of a ticket, we need to round up to the nearest whole number.

Therefore, the organization needs to sell at least 22 tickets to break even.

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Answer:

12.29 I thin

Step-by-step explanation:

The monthly periodic interest rate is 0.01%.

Simple interest is a method of calculating the interest charge. Simple interest can be calculated as the product of principal amount, rate and time period.

Simple Interest = (Principal × Rate × Time) / 100

We are given that;

APR=14.75%

Now,

The monthly periodic interest rate is the annual interest rate divided by 12 months. According to 1, the formula is:

r = (1 + i/m)^(m/n) - 1

Where:

r = periodic interest rate

i = nominal annual rate

m = number of compounding periods per year

n = number of payments per year

In this case, i = 14.75%, m = 12 and n = 12. Plugging these values into the formula, we get:

r = (1 + 0.1475/12)^(12/12) - 1

r = (1 + 0.012292) - 1

r = 0.012292 or 1.23%

Therefore, by the given APR the interest rate will be 0.01%, rounded to the nearest hundredth of a percent.

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Answer:

The formation of a linear programming model involves the following steps:

1. Define the objective: Determine what you want to optimize or minimize, such as maximizing profit or minimizing costs.

2. Identify the decision variables: Identify the variables that affect the objective, such as the number of units produced.

3. Formulate the constraints: Establish the limitations that the model needs to operate within, such as production capacity, labor availability, or budget constraints.

4. Write the mathematical equations: Use the identified decision variables, constraints and objective function to write a set of linear equations.

5. Test and solve the model: Test the model by solving the linear equations using mathematical techniques such as simplex method or graphical method.

6. Interpret the results: Analyze the results of the model to gain insights into the optimization of your objective and how changes in variables or constraints can affect the outcome.

According to the question approximately 83.89% of professors make more than $75,000 calculated by forming the equation.

When the roots and solutions of two equations match, they are said to be equivalent. The same number, symbols, or expression must be added to or subtracted from both the equation's two sides to produce an equivalent equation. By multiplying or dividing both sides of an equation by a nonzero number, we can also obtain an analogous equation.

This issue can be resolved using the conventional normal distribution. First, we need to standardize the value of $75,000 using the formula:

z = (x - μ) / σ

where x is indeed the value we wish to standardise, is indeed the mean, and is the deviation.

z = (75,000 - 85,900) / 11,000

z = -0.99

Next, we look up the area to the right of z = -0.99 in the standard normal distribution table or by using a calculator. The area to the left of z = -0.99 is 0.1611, so the area to the right of z = -0.99 is:

1 - 0.1611 = 0.8389

Therefore, approximately 83.89% of professors make more than $75,000.

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The interquartile range of the number of novels written by each of Amir's 10 favorite authors is 6.

What is the interquartile range ?

In statistics, the interquartile range (IQR) is a measure of variability, based on dividing a data set into quartiles. Quartiles divide the data set into four equal parts, with the interquartile range being the difference between the upper (third) and lower (first) quartiles. The IQR represents the middle 50% of the data, and is used as a measure of spread or dispersion in a data set, particularly when the data set contains outliers.

To find the interquartile range (IQR), we need to first find the first quartile (Q1) and the third quartile (Q3).

To find Q1:

Arrange the data in order from smallest to largest: 1 3 3 4 5 7 8 10 12 23

Find the median of the lower half of the data (the first five numbers): (3+3)/2 = 3

This is the first quartile (Q1)

To find Q3:

Arrange the data in order from smallest to largest: 1 3 3 4 5 7 8 10 12 23

Find the median of the upper half of the data (the last five numbers): (8+10)/2 = 9

This is the third quartile (Q3)

Now we can calculate the IQR:

IQR = Q3 - Q1 = 9 - 3 = 6

Therefore, the interquartile range of the number of novels written by each of Amir's 10 favorite authors is 6.

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Answer: for each of the players' uniform it would be $60.99

Step-by-step explanation:

so here would be the equation written out.

975.84=16x

so, to get x by itself you would need to divide by 16.

x=60.99

Answer:

Start off with the 20ft sides

20x2 =40ft

40ft + 8ft = 48ft

Now we need to find the perimeter of the half circle.

Since we know the diameter of the half circle is 8ft, we can use the following formula: Diameter x Pi = Circumference

Plug in:

8ft x 3.14159 = 25.132ft

25.132 /2 gives us the perimeter of the half circle

25.132 / 2 = 12.566

Rounded = 12.57 ft

48 ft + 12.57 ft =  60.57 feet perimeter.

The perimeter of the given solution is 76.56 feet.

We need to find the perimeter of the figure by splitting the figure into a rectangle and a semi-circle. The radius for the semi-circle is found by dividing the diameter by 2, Radius = 8 ÷ 2 = 4.

Therefore, the formula for finding the Perimeter of the given rectangle is  

P = 2( l+b )

P = 2( 20 + 8)

P = 56 feet.

now, the formula for the circumference of a semi-circle is

C = [tex]\pi[/tex]r + 2r

C = 3.14( 4) + 2 (4)

C = 20.56 feet.

Therefore, the perimeter of the given figure is

The perimeter of  the rectangle + circumference of the Semi-circle

= 56 + 20.56

= 76.56 feet

Therefore, the perimeter of the given solution is 76.56 feet.

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Answer:

[tex]\textsf{1.}\quad \sf \overline{AZ} = 28 \; meters[/tex]

[tex]\textsf{2.}\quad \sf \overline{AM} = 28 \; meters[/tex]

[tex]\textsf{3.}\quad b = \sf 4[/tex]

[tex]\textsf{4.}\quad \sf Perimeter = 112\; meters[/tex]

[tex]\textsf{5.}\quad \sf \overline{MX} = 22\; meters[/tex]

[tex]\textsf{6.}\quad \sf \overline{AX} = 10\sqrt{3}\; meters[/tex]

[tex]\textsf{7.}\quad \sf \overline{EX} = 10\sqrt{3}\; meters[/tex]

[tex]\textsf{8.}\quad \sf \overline{AE} = 20\sqrt{3}\; meters[/tex]

Step-by-step explanation:

All sides of a rhombus are the same length. Therefore, for rhombus MAZE:

[tex]\sf \overline{AZ} = \overline{AM} = \overline{ZE} = \overline{EM}[/tex]

Given:

As the sides of a rhombus are the same length, we can equate the expressions for sides AZ and AM, and solve for b:

[tex]\begin{aligned}\overline{\sf AZ}&=\overline{\sf AM}\\8b-4&=5b+8\\8b-4-5b&=5b+8-5b\\3b-4&=8\\3b-4+4&=8+4\\3b&=12\\3b \div 3&=12 \div 3\\b&=4\end{aligned}[/tex]

Therefore, the value of b is 4.

To find the length of AZ and AM, substitute the found value of b into one of the expressions:

[tex]\begin{aligned}\overline{\sf AZ}&=8b-4\\&=8(4)-4\\&=32-4\\&=28\end{aligned}[/tex]

Therefore, as AZ = AM, then AZ = 28 and AM = 28.

[tex]\hrulefill[/tex]

As the sides of a rhombus are equal in length, each side length is 28 meters (as found previously).

The perimeter of rhombus MAZE is the sum of its side lengths. Therefore:

[tex]\begin{aligned}\sf Perimeter\;MAZE&=\sf \overline{AZ} +\overline{AM} +\overline{ZE}+ \overline{EM}\\&=28+28+28+28\\&=112\; \sf meters\end{aligned}[/tex]

Therefore, the perimeter of rhombus MAZE is 112 meters.

[tex]\hrulefill[/tex]

The point of intersection of the diagonals of rhombus MAZE is point X.

As the diagonals of a rhombus are perpendicular bisectors of each other, then:

[tex]\sf \overline{AX}=\overline{EX}\quad and \quad \overline{AX}+\overline{EX}=\overline{AE}[/tex]

[tex]\sf\overline{MX}=\overline{ZX}\quad and \quad\overline{MX}+\overline{ZX}=\overline{MZ}[/tex]

Given MZ = 44 meters, and MX is half of MZ, then:

[tex]\sf \overline{MX}=\overline{ZX}=22\;meters[/tex]

As the diagonals bisect each other at 90°, m∠MXA= 90°. Therefore, ΔMXA is a right triangle with hypotenuse AM = 28 and leg MX = 22.

As we know the lengths hypotenuse AM and leg MX, we can use Pythagoras Theorem to calculate the length of the other leg, AX:

[tex]\begin{aligned}\sf \overline{AX}^2+\overline{MX}^2&=\sf \overline{AM}^2\\\sf \overline{AX}^2+22^2&=\sf 28^2\\\sf \overline{AX}^2&=\sf 28^2-22^2\\\sf \overline{AX}&=\sqrt{\sf 28^2-22^2}\\\sf \overline{AX}&=\sf 10\sqrt{3}\; meters\end{aligned}[/tex]

As the diagonals bisect each other, AX = EX. Therefore:

[tex]\sf \overline{EX}=\sf 10\sqrt{3}\; meters[/tex]

The length of diagonal AE is the sum of segments AX and EX. Therefore:

[tex]\begin{aligned}\sf \overline{AE}&=\sf \overline{AX}+\overline{EX}\\&=\sf 10\sqrt{3}+10\sqrt{3}\\&=\sf 20\sqrt{3}\; meters\end{aligned}[/tex]

[tex]\hrulefill[/tex]

Note: The attached diagram is drawn to scale.

Answer:

Step-by-step explanation:

To solve this problem, we can use the formula for calculating the fixed monthly payment on a mortgage:

P = (r * PV) / (1 - (1 + r)^(-n))

where:

P = fixed monthly payment

r = monthly interest rate (annual interest rate divided by 12)

PV = present value of the loan (loan amount)

n = total number of payments (number of years multiplied by 12)

Using the given values:

r = 0.0735 / 12 = 0.006125

PV = R150,000

n = 20 x 12 = 240

Then we can calculate the monthly payment:

P = (0.006125 * 150000) / (1 - (1 + 0.006125)^(-240)) = R1,181.91

This means that Gideon will have to pay R1,181.91 every month for 20 years to repay his loan.

To determine how much of the second payment applies to the principal balance, we need to calculate the interest and principal amounts of the first payment.

For the first payment, the interest can be calculated as:

interest1 = r * PV = 0.006125 * 150000 = R918.75

This means that the first payment consists of R918.75 in interest and the rest, R1,181.91 - R918.75 = R263.16 is principal.

To find out how much of the second payment applies to the principal balance, we need to subtract the interest and add the calculated principal amount from the first payment to the amount of the second payment:

principal2 = (P - interest1) + principal1 = (1181.91 - 918.75) + 263.16 = R525.32

Therefore, R525.32 of the second payment applies to the principal balance.

Answer:

[tex]\boxed {\left(-1, -\dfrac{3}{7}\right)} \longrightarrow \boxed{f\left(x\right)\:=\:\frac{1}{2}\left|x\:+\:1\right|-\frac{3}{7}}[/tex]

[tex]\boxed{\left(5,\:\frac{2}{3}\right)} \longrightarrow \boxed{f\left(x\right)\:=\:\frac{3}{5}\left|x\:-\:5\right|+\:\frac{2}{3}}[/tex]

[tex]\boxed{\left(0,\:-\frac{4}{5}\right)} \longrightarrow \boxed{f\left(x\right)\:=\frac{1}{2}\left|x\right|\:-\:\frac{4}{5}}[/tex]

[tex]\boxed{\left(\frac{2}{5},\:\frac{5}{3}\right)} \longrightarrow \boxed{f\left(x\right)\:=\frac{3}{2}\left|x-\frac{2}{5}\right|+\frac{5}{3}}[/tex]

Step-by-step explanation:

The vertex of an absolute function
y = f(x) = a|x - b| + c occurs at x - b = 0 or when x = b

Plugging this  into the original equation will give the value for f(b) which will be f(b) = 0 + c which will be the y-value of the vertex

[tex]\text{Vertex of } f(x) = \dfrac{3}{5} |x - 5| + \dfrac{2}{3}\\\\ \longrightarrow x = 5, y = \dfrac{2}{3} \\\\\longrightarrow \left(5, \dfrac{2}{3} \right)[/tex]

You can do the others in a similar manner.

Here it is easier because the constant in f(x) corresponds to the y-coordinate of the vertex and they are different in the answer choices

Answer:

0.33

Step-by-step explanation:

There are a total of 5 + 15 + 10 + 15 = 45 people in the restaurant.

The probability of selecting a manager or a cook is the sum of the probabilities of selecting a manager and selecting a cook, since these events are mutually exclusive (a person cannot be both a manager and a cook at the same time).

The probability of selecting a manager is 5/45, since there are 5 managers out of 45 people in total.

The probability of selecting a cook is 10/45, since there are 10 cooks out of 45 people in total.

Therefore, the probability of selecting either a manager or a cook is:

P(manager or cook) = P(manager) + P(cook)

P(manager or cook) = 5/45 + 10/45

P(manager or cook) = 15/45

P(manager or cook) = 1/3

So, the probability that the person selected at random is either a manager or a cook is 1/3 or approximately 0.333

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Therefore , the solution of the given problem of percentage comes out to be 15 customers per hour make up the unit cost. 15 clients per hour, to be exact.

A number or statistic that is stated as an amount of 100 is referred to as "a%" in statistics. The forms "pct," "pct," or "pc" are additionally uncommon. The common way to indicate it is with a representation "%," though. The ratio to the total sum is flat, and there are no indicators. Percentages are actually integers because they almost always add up to 100. To suggest that a number indicates a percentage, either the word "fraction" or a representation for percentage (%) must come before the number.

Here,

We must divide the overall number of customers by the number of hours in order to determine the unit rate (in customers per hour).

There are 120 total clients.

There are 8 hours in all.

Unit rate is equal to the sum of all clients times the number of hours.

=> Unit rate: 120 / 8

=>  Rate per unit: 15

Consequently, 15 customers per hour make up the unit cost. 15 clients per hour, to be exact.

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In response to the stated question, we may state that Therefore, the cylinder volume of the tank is approximately 301 cubic feet.

A cylinder is a three-dimensional polyhedron made up of two congruent parallel circular bases but a curving surface linking the two bases. The bases of a cylinder are all equal to its axis, which is an artificial straight line across the centre of both bases. The volume of a cylinder is the composite of its base area and length. The volume of a cylinder is computed as V = r2h, where "V" represents the volumes, "r" represents the circle of the base, and "h" is the height of the cylinder. The formula to find the volume of a cylinder is:

[tex]V = \pir^2h[/tex]

Where V is the volume, r is the radius, h is the height, and π is a constant value that approximates to 3.14.

[tex]V = 3.14 * 4^2 * 6\\V = 3.14 * 16 * 6\\V = 301.44\\V = 301 ft^3[/tex]

Therefore, the volume of the tank is approximately 301 cubic feet.

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The derivative οf [tex]y = e^{(-5tan(\sqrt{x}))[/tex]  is [tex]-5/2x^{(1/2)[/tex] [tex]* sec^2(\sqrt{x}) * e^{(-5tan(\sqrt{x}))}).[/tex]

A functiοn's varied rate οf change with respect tο an independent variable is referred tο as a derivative. When there is a variable quantity and the rate οf change is irregular, the derivative is mοst frequently utilised.

The derivative is used tο assess hοw sensitive a dependent variable is tο an independent variable (independent variable). In mathematics, a quantity's instantaneοus rate οf change with respect tο anοther is referred tο as its derivative. Investigating the fluctuating nature οf an amοunt is beneficial.

[tex]dy/dx = d/dx (e^{(-5tan(\sqrt{x}))}) = e^{(-5tan(\sqrt{x}))} * d/dx (-5tan(\sqrt{x}))[/tex]

Next, we need tο find the derivative οf -5tan(√x) using the chain rule and the prοduct rule:

d/dx (-5tan(√x)) = -5 * d/dx (tan(√x)) = -5 * sec^2(√x) * d/dx (√x)

Tο find the derivative οf √x, we use the pοwer rule:

[tex]d/dx (√x) = 1/2x^{(1/2)[/tex]

Substituting this back intο the derivative οf -5tan(√x), we have:

[tex]d/dx (-5tan(\sqrt{x})) = -5 * sec^2(\sqrt{x}) * (1/2x^{(1/2)})[/tex]

Nοw we can substitute this back intο the derivative οf y:

[tex]dy/dx = e^{(-5tan(\sqrt{x}))} * (-5 * sec^2(\sqrt{x}) * (1/2x^{(1/2)}))[/tex]

Simplifying this, we get:

dy/dx = -5/2x^(1/2) * sec^2(√x) * e^(-5tan(√x))

Therefοre, the derivative of y = [tex]e^{(-5tan(\sqrt{x}))[/tex] is [tex]* sec^2(\sqrt{x}) * e^{(-5tan(\sqrt{x}))}).[/tex]

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Answer:

12x² + 12xh + 4h² - 5

Step-by-step explanation:

f(x + h) - f(x) / h

= [4(x + h)³ - 5(x + h)] - [4x³ - 5x] / h

= [4x³ + 12x²h + 12xh² + 4h³ - 5x - 5h] - [4x³ - 5x] / h

= 4x³ + 12x²h + 12xh² + 4h³ - 5x - 5h - 4x³ + 5x / h

= 12x²h + 12xh² + 4h³ - 5h / h

= 12x² + 12xh + 4h² - 5

Hope this helps :)

Answer:

84 feet is equal to 1008 inches. So, the 84-foot building would be 1008 inches divided by 21 feet, which is 48 inches tall in the model.

In the unitary method,

a) For 75km we need = 15 l

b) cost of 45m cloth is  Rs 564.75

c)  cost of 75 shirts is Rs 16875.

What is the unitary method?

The unitary approach involves calculating the value of a single unit, from which we can calculate the values of the necessary number of units.

a) Here using unitary method , we need to find petrol for 1 km.

To travel 125 km we need 25 l pertrol. Then,

for to travel 1 km = [tex]\frac{25}{125} =\frac{1}{5} = 0.2 l[/tex]

Then to travel 75km we need = 0.2×75 = 15 l.

b) Cost of 32m cloth = Rs. 401.60

Then cost of 1m cloth is = [tex]\frac{401.60}{32}=Rs 12.55[/tex]

Now cost of 45m cloth is = 12.55×45 = Rs 564.75

c) Cost of 5 shirts = Rs 1125

Then cost of 1 shirt = [tex]\frac{1125}{5}=Rs 225[/tex]

Now cost of 75 shirts = [tex]225\times75[/tex] = Rs 16875.

Hence using unitary method the answers are,

a) For 75km we need = 15 l

b) cost of 45m cloth is  Rs 564.75

c)  cost of 75 shirts is Rs 16875.

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Step-by-step explanation:

2.2 percentage answer you silly

The brace measures 50 inches in length.

The Pythagorean Theorem states that the squares on the hypotenuse of a right triangle, which is the side opposite the right angle, equals the sum of the squares on the legs of the triangle, a2 + b2 = c2.

The other two sides of the picture frame are its length and width. We thus have:

Length of the hypotenuse (brace)² = Length² of the picture frame + Width² of the picture frame

Let's enter the picture frame's specified dimensions:

Length of the brace² = 30² + 40²

Length of the brace² = 900 + 1600

Length of the brace² = 2500

Taking the square root of both sides, we get:

Length of the brace = √(2500)

Length of the brace = 50

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We may be confident that this is the correct scale factor because both equation equations yield the same value of k. As a result, the dilatation has a scale factor of 5/8 and is centered at the origin.

An equation is a statement in mathematics that states the equality of two expressions. An equation has two sides that are separated by an algebraic equation (=). For example, the argument "2x + 3 = 9" asserts that the phrase "2x + 3" equals the value "9". The purpose of equation solving is to determine which variable(s) must be changed in order for the equation to be true. Simple or complex equations, regular or nonlinear equations, and equations with one or more elements are all possible. In the equation "x2 + 2x - 3 = 0," for example, the variable x is raised to the second power. Lines are employed in a variety of mathematical disciplines, including algebra, calculus, and geometry.

Let (x,y) be a point on the plane and k be the dilation scale factor centred at the origin. The image of (x,y) under dilation is thus given by (kx, ky).

The dilation is given as (4,6) to (5/2,15/4). That is to say:

[tex]k(4) = 5/2 \sk(6) = 15/4\\k = 5/8 \sk = 5/8[/tex]

We may be confident that this is the correct scale factor because both equations yield the same value of k. As a result, the dilatation has a scale factor of 5/8 and is centered at the origin.

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According to the question the percent abundance of the medium nails in the sample is approximately 18.95%.

Whenever the set of data is presented from least to largest, the median is indeed the number in the middle. For instance, since 8 is in the middle, this would represent the median value here.

To find the percent abundance of the medium nails in the sample, we first need to calculate the total number of nails in the sample:

Total number of nails = 67 + 18 + 10 = 95

Next, we can calculate the percent abundance of the medium nails using the formula:

Percent abundance = (number of medium nails / total number of nails) x 100%

Using the values from of the table as inputs, we obtain:

Percent abundance of medium nails = (18 / 95) x 100% ≈ 18.95%

As a result, the sample's average percentage of medium nails is roughly 18.95%.

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Answer:

translation

Step-by-step explanation:

becuz it can't be rotation as it isn't rotated in any way.

it also cant be reflection as it isnt facing the other way.

so its translation

Answer:

Z(1.16)

Step-by-step explanation:

Let's start by expressing "Z increased by 16%" using algebra.

Let Z be the original value of some quantity.

To increase Z by 16%, we need to add 16% of Z to Z:

Z + 0.16Z

Simplifying this expression by factoring out Z, we get:

Z(1 + 0.16)

Combining like terms, we have:

Z(1.16)

Therefore, "Z increased by 16%" can be expressed algebraically as:

Z increased by 16% = Z(1.16)

The Correct answer is  D) Most students read more often than they draw.as the median of the "read" plot is lower than the median of the "draw" plot.

Based on the box plots, we can see that:

The median for the "read" data is around 8 days per month, and the interquartile range (IQR) is between 4 and 12 days.

The median for the "draw" data is around 12 days per month, and the IQR is between 8 and 16 days.

So, we can conclude that:

A) Most students read less than 12 days a month. This is true, since the median for the "read" data is below 12 days per month, and the box plot shows that most of the data is concentrated in the lower half of the range.

B) Most students draw at least 12 days a month. This is not true, since the median for the "draw" data is around 12 days per month, and the box plot shows that there is a considerable amount of data below that median.

C) Most students draw more often than they read. This is not true, since the median for the "read" data is lower than the median for the "draw" data.

D) Most students read more often than they draw. This is true, since the median for the "read" data is lower than the median for the "draw" data, and the box plot shows that most of the "read" data is concentrated in the lower half of the range, while most of the "draw" data is concentrated in the upper half of the range.

The box plots below show data from a survey of students under 14 years old. They were asked on how many days in a month they read and draw. Based on the box plots, which is a true statement about students? pg780337 A Most students read less than 12 days a month. B Most students draw at least 12 days a month. C Most students draw more often than they read. D Most students read more often than they draw.

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The solution is B. [tex]y = 200x + 100[/tex] is a linear equation with a slope-intercept form.

When a function is displayed in a graph, a linear function makes a straight line, but a nonlinear function, which is bent in some way, does not. Whereas the slopes of a non - linear function is changing constantly, the slopes of a linear model remains constant.

The graph of a linear function is a direct line. One regression coefficient and one predictor variables make up a linear function. The variables that are both independent and dependent are X and Y, respectively. The y interception, often known as the constant term a.

The slope-intercept form of a linear equation is [tex]y = mx + b[/tex], where m is the slope and b is the y-intercept. Using the given values, we have:

slope [tex]= 200[/tex]

[tex]y-[/tex]intercept [tex]= 100[/tex]

So, the equation of the linear relationship is:

[tex]y = 200x + 100[/tex]

Therefore, the answer is B. [tex]y = 200x + 100[/tex].

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Zara should buy 400  pairs of jeans ordered from Hong Kong and 100 pairs ordered from Colombia for a total cost of $6,000.

See below for other solutions

Let x be the number of pairs of jeans ordered from Hong Kong and y be the number of pairs ordered from Colombia.

Objective function:

Maximize profit, C(x, y) = 11x + 16y

Subject to the following constraints:

See attachment for the graph, where we have the following corner points

(x, y) = (100, 400), (300, 200), (400, 100)

By substitution, we have

C(100, 400) = 11(100) + 16(400) = 7500

C(300, 200) = 11(300) + 16(200) = 6500

C(400, 100) = 11(400) + 16(100) = 6000

The minimum cost above is $6000

So, Zara should buy 400  pairs of jeans ordered from Hong Kong and 100 pairs ordered from Colombia.

The amount paid for them is $6,000

If the Hong Kong supplier were able to reduce its percentage of defective pairs of jeans from 7% to 5%, we would need to update the constraint accordingly:

0.05x + 0.02y ≤ 0.05(x+y)

The new optimal solution would be to order 425 pairs of jeans from the Hong Kong supplier and 75 pairs of jeans from the Colombian supplier, for a total cost of $5875

i.e. C(425, 75) = 11(425) + 16(75) = 5875

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With 98% confidence, we can say that the population variance is between 7.36 and 71.09.

What is probability?

Probability is a branch of mathematics that deals with the study of chance or randomness in events. It is a measure of the likelihood of an event occurring, expressed as a number between 0 and 1, where 0 represents an impossible event and 1 represents a certain event.

To construct the confidence interval for the population variance, we will use the chi-squared distribution.

First, we need to calculate the chi-squared values for the lower and upper bounds of the confidence interval using the following formulas:

χ²_L = (n - 1) * s² / χ²(α/2, n-1)

χ²_U = (n - 1) * s² / χ²(1-α/2, n-1)

where n is the sample size, s² is the sample variance, α is the level of significance, and χ²(α/2, n-1) and χ²(1-α/2, n-1) are the chi-squared values with α/2 and 1-α/2 degrees of freedom, respectively.

Substituting the given values, we get:

χ²_L = (9 - 1) * 17.3 / χ²(0.01, 8) ≈ 3.355

χ²_U = (9 - 1) * 17.3 / χ²(0.99, 8) ≈ 29.587

Next, we can use these chi-squared values to construct the confidence interval for the population variance:

(V_L, V_U) = [(n - 1) * s² / χ²_U, (n - 1) * s² / χ²_L]

Substituting the given values, we get:

(V_L, V_U) = [(9 - 1) * 17.3 / 29.587, (9 - 1) * 17.3 / 3.355]

Simplifying, we get:

(V_L, V_U) ≈ [7.36, 71.09]

Therefore, with 98% confidence, we can say that the population variance is between 7.36 and 71.09.

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