rebecca and michael took a survey of the number of siblings that each of their classmate had. what percent of the total classmates have 2 siblings

Thus, the probability that this song will be played on no more than two out of every four days is 35.60%.

Combination as well as permutation are two alternative strategies in mathematics to divide up a collection of components into subsets. The subset's components can be listed in whatsoever order when combined. The components of the subset usually listed in a permutation in a certain order.

Since this is a combination issue, we must first determine the combination of 4 select 2, and then multiply that result by the chance of each possible outcome:

Choose 2 from a combination of 4:

C(4, 2) = 4! / (2! * 2!) = 4*3/2 = 6

This figure indicates that there are 6 alternative ways that the 2 days we want to be allocated in the 4 days could be used.

The probability of every event is now:

2 days of song playback: (0.58)²

The song wasn't played for two days: (0.42)².

Hence, the final probability is

P = C(4,2) * (0.58)² * (0.42)²

P = 6 * (0.58)² * (0.42)²

P = 0.3560

Thus, the probability that this particular song will be played on no more than two out of every four days is 35.60%.

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Rounding to the nearest cent, the cost of the utility pole is $2,061.33 with a diameter of 1. 5 ft and a height of 45 ft.

To calculate the cost of a utility pole, we first need to find its volume, which is the product of its height and the cross-sectional area of its base. Since the pole is in the form of a right cylinder, the cross-sectional area of its base is a circle with radius equal to half the diameter, which is 0.75 ft. Therefore, the cross-sectional area is:

Area = πr^2 = π(0.75)^2 = 1.767 ft^2

The volume of the pole is then:

Volume = Area x Height = 1.767 x 45 = 79.515 ft^3

Finally, we can calculate the cost of the pole by multiplying its volume by the cost per cubic foot of wood:

Cost = Volume x Cost per cubic foot = 79.515 x $25.97 = $2,061.33

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Answer:

t8 term is

[tex] \frac{ 1}{1296} [/tex]

The function f(x) = xlnx is decreasing on the open interval (0, e^-1).

To find the interval on which the function f(x) = xlnx is decreasing, we need to find the intervals where the first derivative f'(x) is negative.

Using the product rule of differentiation, we can find the first derivative of f(x) as

f'(x) = x × (1/x) + ln(x) × 1 = 1 + ln(x)

Now, we need to find the values of x where f'(x) < 0

1 + ln(x) < 0

ln(x) < -1

x < e^-1

Therefore, f(x) is decreasing on the interval (0, e^-1).

Note that we exclude x = 0 from the interval because the function is not defined for x ≤ 0.

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The associative property of addition:

[tex](a + b) + c = a + (b + c)[/tex]

We now apply the associative property of addition to the expression in this problem.

[tex](4+9)+11=4+(9+11)[/tex]

Now we follow the correct order of operations by adding the numbers inside the parentheses first.

[tex]= 4 + 20[/tex]

[tex]= 24[/tex]

Answer: B

Answer:

To solve the quadratic equation 2x^2 + x - 3 = 0 by factoring, we follow these steps:

Step 1: Write the equation in standard quadratic form, which is ax^2 + bx + c = 0. In this case, the equation is already in standard form: 2x^2 + x - 3 = 0.

Step 2: Factor the quadratic expression on the left-hand side of the equation. We look for two numbers that multiply to give us the constant term (c) and add to give us the coefficient of the linear term (b). In this case, c = -3 and b = 1.

The two numbers that satisfy these conditions are -3 and 1, as -3 * 1 = -3 and -3 + 1 = -2.

Step 3: Use the factored form to set each factor equal to zero and solve for x.

2x^2 + x - 3 = 0

(2x - 3)(x + 1) = 0 (factored form)

Setting each factor equal to zero:

2x - 3 = 0

2x = 3

x = 3/2

x + 1 = 0

x = -1

So the solutions to the equation are x = 3/2 and x = -1.

We can be 95 % confident that for smokers the pulse rate is between 3.1 and 8.9 beats per minute higher than for nonsmokers.

We are given that the total number of samples taken to observe the resting pulse rates of smokers is 26 with a mean and standard deviation of 80 bpm and 5 bpm respectively while samples taken for nonsmokers is 32 with a mean and standard deviation of 74 bpm and 6 bpm respectively.

We have independent random samples, each less than 10 % of the population, and the data appears to be approximately normal.

For smokers, n1 = 26, y1 = 80, s1 = 5

For non smokers, n2 = 32, y2 = 74, s2 = 6

t = [tex]((y1-y2) - H0)/ \sqrt{(s1^2/n1) + (s2^2/n2}[/tex]

t = [tex]((80 - 74) - 0)/ \sqrt{(5^2/26) + (6^2/32)}[/tex]

t = 4.15

P ≈ 0.0001

df ≈ 56

as the P-value is very small, the difference observed is not a sampling error. We have strong evidence of a difference in mean pulse rates for smokers and nonsmokers.

To find how big is that difference,

[tex](y1-y2)[/tex] ± t* SE(y1-y2)

= [tex](80 - 74)[/tex] ± [tex]t*(\sqrt{5^2/26 + 6^2/26})[/tex]

= (3.1, 8.29)

Therefore, we can be 95 % confident that the difference in resting pulse rates between smokers and nonsmokers is between the interval of 3.1 and 8.29 beats per minute.

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The expression representing the width of the garden is given as follows:

6w + 2.

An equivalent expression is given as follows:

2(3w + 1).

The width of the rectangle is represented as follows:

w.

Six times the width of the rectangle is represented as follows:

6w.

Two feet plus six times the width of the rectangle is represented as follows:

6w + 2.

6 = 2 x 3, hence the simplified expression can be given as follows:

2(3w + 1).

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The domain of the data set {(-10,-6),(-4,-10),(3,8),(9,-2)} are  {-10, -4, 3, 9} and the range are  {-6, -10, 8, -2}.

The domain of a function is the set of all possible inputs for the function. In other words, the domain of a function is the independent value of a function. The domain are usually the x values.

The range of a function refers to all the possible values y could be. Therefore, the range is the dependent values. The range are usually the y values.

Hence,

The domain of the data set are {-10, -4, 3, 9}

The range of the data sets are {-6, -10, 8, -2}

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Answer:

17

Step-by-step explanation:

The midpoint theorem states that “The line segment in a triangle joining the midpoint of any two sides of the triangle is said to be parallel to its third side and is also half of the length of the third side.”

therefore 2(x+5) = 3x-7

distribute

2x+10 = 3x-7

subtract 2x from both sides

2x+10 -2x = 3x-7 -2x

x-7 = 10

add 7 to both sides

x- 7 +7 = 10 + 7

x = 17

Answer:

Step-by-step explanation:

I think you are in 11th grade

we can use the theorem midpoint theorem.

as the mid-point theorem,

2(x+5)=3x-7

2x+10=3x-7

x=17

I really love your profile picture, is it real?

For a inscribed right circular cylinder in sphere of radius r, largest possible surface area of such a cylinder is equals to the [tex]= πr²( 1 + \sqrt{5}) [/tex].

The maximum or minimum value of a continuous function can be determined by derivatives of the function. If y= f(x) is a continuous function, Then slope of function at extreme points( maximum or minimum) is zero, [tex]\frac{dy}{dx} =0[/tex]. Let's consider r be the radius of the sphere and is a constant. Let R and h be the radius and height of the cylinder that can be inscribed in a sphere of radius r as shown in the above figure. By Pythogoras Theorem, base radius of cylinder as,[tex]R =\sqrt{ r²-\frac{h²}{4}}[/tex]

Surface area of cylinder, S = 2πRh + 2πR²

=> [tex]S= 2πh\sqrt{ r²- \frac{h²}{4}} + 2π(r²- \frac{h²}{4}) \\ [/tex]. We need to calculate height of cylinder such that surface area is maximum. For surface area to be maximum, [tex] \frac{dS}{dh} =0[/tex]

[tex]2πh \frac{1}{2\sqrt{ r² - \frac{h²}{4}}}( \frac{ - 2h}{4} ) + 2π\sqrt{ r² - \frac{h²}{4}} + 2π \frac{(-2 )h}{4} = 0 \\ [/tex]

=>[tex] \frac{- h²}{4\sqrt{ r² - \frac{h²}{4}} } + \sqrt{ r² - \frac{h²}{4}} - \frac{h}{2} = 0[/tex]

=> [tex]- h² + 4 ( r² - \frac{h²}{4} ) - 2h\sqrt{ r² - \frac{h²}{4}} = 0 \\ [/tex]

[tex]- 2h² + 4r² - 2h\sqrt{ r² - \frac{h²}{4}} = 0[/tex]

=>[tex]- 2h²+ 4r² = 2h\sqrt{r²- \frac{h²}{4}}[/tex]

Squaring on both sides, [tex]4h^{4} + 16r⁴ - 16r²h² = 4h² ( r² - \frac{h²}{4}) = 0 \\ [/tex]

[tex]h^{4} + 4r⁴ - 4r²h² = h² r² - \frac{h⁴}{4} = 0 \\ [/tex]

=> [tex]5h^{4} + 4r⁴ - 5r²h² = 0 [/tex]

which is Quadratic equation with h² variable, so using quadratic formula for determining the values of h², [tex]=4r^{2} ( \frac{5 ± \sqrt{5}}{10})[/tex]. Since we need largest possible surface area, we will consider, [tex]h² = 4r²( \frac{ 5 - \sqrt{5}}{10})[/tex]

=> [tex]r² - \frac{h²}{4} = r²( \frac{ 5 + \sqrt{5}}{10})[/tex]

Substituting the values in the surface area equation, [tex]S= 2πh\sqrt{ r² - \frac{h²}{4}} + 2π(r² - \frac{h²}{4}) \\ [/tex]

[tex]= 4πr²(\sqrt{ \frac{5 - \sqrt{5}}{10}})(\sqrt{ \frac{ 5 + \sqrt{5}}{10}} )+ 2πr²( \frac{ 5 + \sqrt{5}}{10}) \\ [/tex]

[tex]= 2πr²( \frac{ 4\sqrt{5}}{10} + \frac{ 5 + \sqrt{5}}{10} ) \\ [/tex]

=> [tex]= πr²( 1 + \sqrt{5}) [/tex]

Hence, required area is [tex]= πr²( 1 + \sqrt{5}) [/tex].

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This method is unlikely to give an accurate estimate of the percentage since it chooses only 5 customers from a small sample size, which may not be representative of the entire population of customers.

In statistical terms, the sample size of 5 is considered very small and may not be large enough to capture the variability in customers' preferences. A larger sample size would increase the precision and accuracy of the estimate of the percentage of customers who would buy a new flavor.

A small sample size may lead to unreliable estimates and may not be representative of the population, highlighting the importance of using appropriate sample sizes in statistical analysis.

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The Normal model is a good first-choice to model data if the data is normally distributed or approximately normally distributed

Normally distributed or approximately Normally distributed. The Normal distribution, also known as the Gaussian distribution, is a continuous probability distribution that is widely used in statistical modeling due to its mathematical properties and practical applications in many fields.

When the data is Normally distributed, the Normal model provides a good approximation of the underlying distribution of the data. This means that the parameters of the Normal distribution can be estimated from the data using methods such as maximum likelihood estimation, and the resulting model can be used to make predictions and conduct statistical inference.

However, it is important to note that the Normal model may not be appropriate for all types of data, particularly if the data exhibits significant departures from Normality. In such cases, other distributional models or non-parametric methods may be more appropriate.

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To find the values of c that make f continuous everywhere, Finally, from the graph above, it looks like the slope of the tangent at x = 2 is around 1.

For x < 15, the function is given by x² - c*x + 9. To ensure continuity at x = 15, we need to find the limit of the function as x approaches 15 from both sides:
lim x→15- (x² - c*x + 9) = 15² - c*15 + 9 = 201 - 15c
lim x→15+ (x² - c*x + 9) = 15² - c*15 + 9 = 201 - 15c

For continuity at x = 15, we need these two limits to be equal, so we set them equal to each other:
201 - 15c = 201 - 15c

Solving for c, we get c = 13.4 (rounded to 3 decimal places).
For x > 15, the function is given by x² - c*x + 9. To ensure continuity at x = 15, we need to find the limit of the function as x approaches 15 from both sides:
lim x→15- (x² - c*x + 9) = 15² - c*15 + 9 = 201 - 15c
lim x→15+ (x² - c*x + 9) = 15² - c*15 + 9 = 201 - 15c

For continuity at x = 15, we need these two limits to be equal, so we set them equal to each other:
201 - 15c ≤ 15 Solving for c, we get c ≥ 12.9 (rounded to 3 decimal places).

Therefore, the values of c that make f continuous everywhere are 13.4 ≤ c ≤ 12.9.
To estimate the value of f'(-2), we can look at the slope of the tangent line at x = -2 on the graph. From the graph, it looks like the slope of the tangent at x = -2 is around -2.5. Rounding to one decimal place, we estimate f'(-2) to be -2.5.

Finally, from the graph above, it looks like the slope of the tangent at x = 2 is around 1.

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An angle formed by a tangent and a chord in a circle is called an "angle between tangent and chord" while an inscribed angle is an angle whose vertex is on the circle and whose sides intersect the circle at two distinct points.

When a tangent line and a chord intersect at a point on the circle, the tangent line is perpendicular to the radius drawn to the point of intersection.

This means that the angle between the tangent and the chord is equal to the angle between the radius and the chord.

Now, consider an inscribed angle that intercepts the same arc as the chord.

By the inscribed angle theorem, the measure of an inscribed angle is half the measure of the arc that it intercepts.

Thus, the measure of the inscribed angle is equal to the measure of the arc that the chord intercepts.

Since the angle between the tangent and the chord is equal to the angle between the radius and the chord, and the inscribed angle intercepts the same arc as the chord, it follows that the angle between the tangent and the chord is equal to the inscribed angle that intercepts the same arc.

Therefore, an angle formed by a tangent and a chord has the same measure as an inscribed angle that intercepts the same arc.

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Answer:

10

20,00/2000=10

Step-by-step explanation:

Hope this helps! =D
Mark me brainliest! =D

Answer: 10 tons.

Step-by-step explanation: There are 2000 pounds in one ton. Hence:

20000 lb ÷ 2000 lb/ton = 10 tons

Therefore , the solution of the given problem of equation comes out to be the system of equations has an answer of x = -10.51 and  y = 6.26.

In intricate algorithms, variable words are typically employed to demonstrate consistency between two opposing arguments. Equations are academic phrases that are used to demonstrate the equality of different academic figures. Consider the specifics of the above x + 7 suggestions. improving in this case provides b + 7 while constructing y + 7 before integrating.

Here,

Let's apply these steps to the provided equation system:

=> -8y = 5x + 17 ...(1)

=> -7y = -2x - 17 ...(2)

Solve equation (1) for x in terms of y in step 1:

=> -8y = 5x + 17

=> 5x = -8y - 17

=> x = (-8y - 17)/5

Step 2: Replace the value of x in equation (2) with the expression from step 1:

=> -7y = -2((-8y - 17)/5) - 17

Step 3: Address the equation that results for y.

=> -7y = (-16y - 34)/5 - 17

=> -35y = -16y - 34 - 85

=> -35y + 16y = -119

=> -19y = -119

=> y = (-119)/(-19)

=> y = 6.26

Step 4: Replace the formula for x from step 1 with the value of y obtained in step 3:

=> x = (-8(6.26) - 17)/5

=> x = -10.51

Consequently, the system of equations has an answer of x = -10.51 and  y = 6.26.

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Answer:

x+2

hope this helps ;)

and cute pfp

Answer:

Step-by-step explanation:

x-1, because 3 fits the criteria, x>=1

Each person will get 17 pencils.

Division is the opposite of multiplication. For example, If 3 groups of 4 make 12 in multiplication, 12 divided into 3 equal groups give 4 in each group in division.

The main goal of dividing is to see how many equal groups are formed or how many are in each group when sharing fairly.

In the problem given above, to divide 68 colored pencils to 4 students each, you will have to put 68 colored pencils for each student. So, 68 divided by 4 will give the result 17.

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Answer:

(x - 4)² + (y + 3)² = 4

Remember the circle formula:

(x - h)² + (y - k)² = r²

h = X center point  

k = Y center point

In this case your center point is (4,-3) and your radius is 2

If u plug everything in and simplify you should get this:

(x - 4)² + (y - (-3))² = 2²

(x - 4)² + (y + 3)² = 4

The binary representation of the number 77 ten is 1001101 two . This can be found by repeatedly dividing 77 by 2 and writing down the remainders in reverse order.

Binary representation is a system of representing numbers using only two digits, usually 0 and 1. It is used extensively in digital electronics and computer programming.

The remainder is the amount left over after dividing one number by another. It represents the part of the dividend that could not be evenly divided by the divisor.

According to the given information:

To convert the number 77 ten to base two, we need to find the binary representation of this number.

One way to do this is to repeatedly divide the number by 2 and keep track of the remainders. We continue dividing until the quotient is 0. Then, we read the remainders in reverse order to get the binary representation.

Here's how the calculation works:

Reading the remainders in reverse order gives us 1001101, which is the binary representation of 77 ten. Therefore, 77 ten = 1001101 two .

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The area of Pac-Man to the nearest tenth mm² is 11.4 mm².

A circle's area is the area that it takes up in a two-dimensional plane. It can be simply calculated using the formula A = r2, (Pi r-squared), where r is the circle's radius.

To find the area of Pac-Man, we need to calculate the area of the sector that corresponds to the angle of his open mouth and subtract the area of the isosceles triangle formed by the two radii of the sector and the chord that represents the straight edge of his mouth.

First, we need to calculate the angle in radians that corresponds to the 60° angle given:

angle in radians = (60/360) x 2π = π/3 radians

Next, we can use the formula for the area of a sector:

Area of sector = (angle in radians / 2π) x πr²

where r is the radius of the circle.

Area of sector = (π/3 / 2π) x π(13mm)² ≈ 84.95 mm²

Now, we need to calculate the area of the triangle. We can use the formula for the area of an isosceles triangle:

Area of triangle = (1/2) x base x height

where the base is the chord that represents the straight edge of Pac-Man's mouth, and the height is half the length of the chord times the sine of half the angle of the mouth opening.

The base of the triangle is given by the formula:

base = 2r x sin(angle/2)

base = 2(13mm) x sin(30°) ≈ 22.52 mm

The height of the triangle is given by the formula:

height = (base / 2) x sin(angle/2)

height = (22.52 mm / 2) x sin(30°) ≈ 6.53 mm

Therefore, the area of the triangle is:

Area of triangle = (1/2) x base x height ≈ 73.5 mm²

Finally, we can subtract the area of the triangle from the area of the sector to get the area of Pac-Man:

Area of Pac-Man ≈ 84.95 mm² - 73.5 mm² ≈ 11.4 mm²

Therefore, the area of Pac-Man to the nearest tenth mm² is 11.4 mm².

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First, we need to calculate the circumference of the circle. The formula for the circumference of the circle is:

[tex]\text{C}=2\pi \text{r}[/tex]

If we substitute 175 ft for [tex]\text{r}[/tex] and use 3.14 to approximate [tex]\pi[/tex] we get a circumference of:

[tex]\text{C}=2\times3.14\times175 \ \text{ft}[/tex]

[tex]\text{C}=6.28\times175 \ \text{ft}[/tex]

[tex]\text{C}=1099 \ \text{ft}[/tex]

We can now convert the circumference in feet to inches:

[tex]1099 \ \text{ft}\times \dfrac{12 \ \text{in}}{1 \ \text{ft}} \implies[/tex]

[tex]1099\times12 \ \text{in}\implies[/tex]

[tex]=13188[/tex]

To find how many flowers we need we can divide the circumference in inches by the 3 inches between flowers giving:

[tex]13188 \ \text{in}\times\dfrac{1 \ \text{flower}}{3 \ \text{in}}\implies[/tex]

[tex]13188 \ \text{in}\times\dfrac{1 \ \text{flower}}{3 }\implies[/tex]

[tex]\dfrac{13188 \ \text{flower}}{3 }\implies[/tex]

[tex]=4396 \ \text{flower}[/tex]

You would require 4,396 flowers

The scale factor in scale drawing from figutre A to figure B is 4

In a scale drawing, the scale factor represents the ratio of the size of an object in the drawing to the size of the corresponding object in real life.

In the given scale drawing, the object is scaled up from 7 cm to 28 cm.

Therefore, the scale factor can be calculated as follows:

scale factor = size of object in drawing / size of corresponding object in real life

scale factor = 28 cm / 7 cm

scale factor = 4

So, the scale factor in this scale drawing is 4.

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The area of the parallelogram is[tex]39\sqrt(15)[/tex] square units.

In the preceding diagram, we must determine the height of the parallelogram in order to determine its area. The length of the perpendicular line segment drawn from vertex A to side BC determines the parallelogram's height. We'll refer to this line segment as AD. Since AD is perpendicular to BC, we can calculate its length using the Pythagorean theorem:

[tex]AD^2 = AC^2 - CD^2[/tex]

[tex]AD^2 = 12^2 - 3^2[/tex]

[tex]AD^2 = 135[/tex]

[tex]AD = \sqrt(135) = 3\sqrt(15)[/tex]

Now that we know the height of the parallelogram, we can use the formula for the area of a parallelogram:

Area = base x height

The base of the parallelogram is the length of side AB, which is 13 units. Therefore, the area of the parallelogram is:

[tex]Area = 13 \times 3\sqrt(15)[/tex]

[tex]Area = 39\sqrt(15) square units[/tex]

Therefore, the area of the parallelogram is [tex]39\sqrt(15)[/tex] square units.

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A dot plot is a simple type of graph that represents data using dots. It is a one-dimensional display of data where each dot represents a single data point. Dot plots are useful for showing the distribution of a set of values, particularly when the data set is small.

To create a dot plot, you simply draw a horizontal or vertical line and plot a dot above or beside the line for each data point. The dots are usually stacked vertically or horizontally if there are multiple data points with the same value.

    |         x

 8  |     x  

 7  | x x x  

 6  | x x x x

 5  | x x x x

 4  | x x x x x

 3  | x x x x x

 2  | x x x x x x

 1  | x x x x x x x

     ---------------

        1 2 3 4 5 6 7

In this example, the dot plot shows the number of times a dice roll resulted in a particular value. The x's represent the data points, and the numbers on the left indicate the frequency of each value.

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The equation of the line is y=5x+17.

What is slope intercept form of the equation?

When the slope of the line being studied is known, and the provided point is also the y intercept, the slope intercept formula, y = mx + b, is utilised (0, b).   It provides both a slope and an intercept, which is why the form is known as the slope-intercept form.

Here the given the point [tex](x_1,y_1)=(-4,-3)[/tex] and slope m = 5.

Now using equation formula then,

=> [tex]y-y_1=m(x-x_1)[/tex]

=> y -(-3)=5(x-(-4))

=> y+3 = 5(x+4)

=> y+3 = 5x+20

=> y = 5x+20-3

=> y = 5x+17

Hence the slope intercept form of the equation is y = 5x+17.

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Answer:

40% , 24% , 36%

Step-by-step explanation:

first express each as a fraction then multiply the fraction by 100%

A

[tex]\frac{200}{500}[/tex] × 100% = 0.4 × 100% = 40% used for bread

B

[tex]\frac{120}{500}[/tex] × 100% = 0.24 × 100% = 24% used for biscuits

C

percentage not used = 100% - (40 + 24)% = 100% - 64% = 36%

The slope of a simple gable roof can be defined using the terms rise and run.

The correct definition is:
B. The slope of a simple gable roof is the rise of the roof divided by the run of the roof.

To calculate the slope, follow these steps:
Measure the rise of the roof (the vertical distance between the highest and lowest points).
Measure the run of the roof (the horizontal distance between the edge of the roof and the point directly below the highest point).
Divide the rise by the run to find the slope.
Remember, the slope is a ratio representing the steepness of the roof, and it is important for proper drainage and structural stability.

Option B. The slope of a simple gable roof is the rise of the roof divided by the run of the roof.
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