The difference between the number of customers in line at the express checkout and the number in line at the superexpress checkout is x1 − x2. calculate the expected difference.

The slope of the blue curve measures the plane's rate of descent. the unit of measurement for the slope of the curve is feet per minute. at point a, the slope of the curve is -2,500, which means that the plane is descending at a rate of 2,500 feet per minute. at point b, the slope of the blue curve is , which means that the plane is at a rate of feet per minute

As you are measuring altitude against time, the slope of the curve measures the plane's rate of climb or descent.

At t = 0, the plane is at an altitude of 11 kilometer. It is descending all the time until at t = 10 the plane reaches ground level.  At both points the plane is descending.  Whereas at point A, the tangent line shows the rate of descent as 2 km over 2 minutes = 1 km per minute.

At point B, the tangent line shows the rate of descent as 2 km over 4 minutes = ½ km per minute.

Grade:  9

Subject:  Mathematics

Chapter:  Math and Graphing Assessment

Keywords:  feet per minute, The slope of the blue curve, the unit of measurement, the plane, the slope

The slope of the curve on a position versus time graph represents the instantaneous velocity of the plane. The unit of measurement is typically meters per second or feet per minute, and the slope at a given point can be calculated using a tangent line at that point.

The slope of the blue curve is related to the instantaneous velocity of the plane on a position versus time graph. The unit of measurement for the slope of the curve is meters per second (m/s) or feet per minute depending on the system being used. At point A, the slope indicates the rate at which the plane's velocity is at that moment in time. The steeper the slope of the curve at a particular point, the faster the plane is moving at that instant. At point B, a different slope value would imply a different instantaneous velocity.

To calculate the slope at any point, you would draw a straight line tangent to the curve at that point, which represents the instantaneous velocity. The slope is calculated as the 'rise over run'—the change in position (displacement) over the change in time. If we had specific numerical values at points A and B, we could calculate and state the exact rates of change in the plane's position, hence giving us the instantaneous velocities at those points.

The height of the statue is 97.6 meters

The Breakdown

To determine the height of the statue, we can use trigonometry and create a right triangle with the sailor, the tip of the torch, and the top of the statue.

Assuming the height of the statue is "h" (in meters). The distance between the sailor and the statue is the sum of the initial distance and the additional distance sailed, which is 110 meters.

In the first observation, the angle of elevation is 25 degrees. This means that the tangent of the angle is equal to the height of the statue divided by the initial distance between the sailor and the statue:

tan(25°) = h / initial distance

Similarly, in the second observation, the angle of elevation is 43 degrees and 50 minutes. We need to convert this angle to decimal degrees before using it in calculations. 50 minutes is equal to 50/60 = 5/6 degrees.

So, the angle of elevation in decimal degrees is 43 + 5/6 = 43.8333 degrees.

Now, we can use the tangent function again to relate the height of the statue to the new distance between the sailor and the statue:

tan(43.8333°) = h / (initial distance + 110)

We have two equations with two unknowns (h and initial distance). We can solve this system of equations to find the height of the statue.

Solving the first equation for the initial distance:

initial distance = h / tan(25°)

Substituting this value into the second equation, we get:

tan(43.8333°) = h / (h / tan(25°) + 110)

Now, we can solve this equation for h:

h = (tan(43.8333°) × 110) / (1 - tan(43.8333°) / tan(25°))

Using a calculator, we find that:

tan(43.8333°) ≈ 0.957

tan(25°) ≈ 0.466

Substituting these values into the equation:

h = (0.957 × 110) / (1 - 0.957 / 0.466)

h ≈ 97.6 meters

Therefore, the height of the statue is 97.6 meters.

Answer:

Mr. Chang

Step-by-step explanation:

29.99 * .20= 5.998

29.99- 5.998 = she payed 23.99

25* .10= 2.50

25-2.50= he payed 22.50

Therefore he payed more

Step-by-step explanation:

Answer:

The common ratio r is -7.

Step-by-step explanation:

The common ratio of a geometric sequence is the division of the term [tex]a_{n+1}[/tex] by the term [tex]a_{n}[/tex].

In this problem, we have that:

[tex]a_{1} = 2, a_{2} = -14, a_{3} = 98, a_{4} = -686[/tex].

So the common ratio r is:

[tex]r = \frac{-14}{2} = \frac{98}{-14} = \frac{-686}{98} = -7[/tex]

The common ratio r is -7.

Adding 10 to every observation in a sample, the sample mean would be 10 more the precious one and the standard deviation will remain the same.

"It is an average of a set of data."

"For a sample of observation [tex]x_1,x_3,x_2,...,x_n[/tex] the mean of the sample is,

[tex]\Rightarrow \bar{X}=\frac{x_1+x_3+x_2+...+x_n}{n}[/tex]"

"It is a measure of how dispersed the data from the mean."

[tex]\Rightarrow \sigma=\sqrt{\frac{\Sigma(x_i-\bar{X})^2}{N}}[/tex]

where, [tex]\bar{X}[/tex] is the mean of sample and N is the size of sample

For given question,

Let [tex]x_1,x_3,x_2,...,x_n[/tex] be a sample observation.

We need to check if we add 10 to all of the observations in a sample, then does this change the sample mean. Also we have to check how does it change the sample standard deviation.

Let [tex]\bar{X}[/tex] be the mean of [tex]x_1,x_3,x_2,...,x_n[/tex]

[tex]\Rightarrow \bar{X}=\frac{x_1+x_3+x_2+...+x_n}{n}[/tex]

We add 10 to all of the observations in a sample.

[tex]\Rightarrow x_1+10,x_3+10,x_2+10,...,x_n+10[/tex]

The mean of above sample would be,

[tex]=\frac{(x_1+10)+(x_3+10)+(x_2+10)...+(x_n+10)}{n}\\\\=\frac{10n + (x_1+x_3+x_2+...+x_n)}{n}\\\\ =\frac{10n}{n} +\frac{x_1+x_3+x_2+...+x_n}{n}\\\\ =10 + \bar{X}[/tex]

This means, if we add 10 to every observation in a sample then the sample mean we 10 more the precious one.

In case of standard deviation,

adding 10 to every observation will not change the [tex](x_i-\bar{X})[/tex] factor.

This means, the standard deviation will remain the same.

Therefore, adding 10 to every observation in a sample, the sample mean would be 10 more the precious one and the standard deviation will remain the same.

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Final answer:

Adding 10 to each observation in a sample raises the sample mean by 10 but does not change the sample standard deviation, which measures the variability or spread of the data from the mean.

Explanation:

When you add 10 to all of the observations in a sample, you increase the sample mean by 10. This is because the mean is the average of all the values, and increasing each value by 10 raises the average by the same amount. However, this adjustment does not affect the sample standard deviation because standard deviation is a measure of variability or spread of the data from the mean, and adding a constant to each data point does not change the spread of the data relative to each other.

To understand how this works, suppose we have a sample with observations such as 3, 7, and 4. The sample mean is (3+7+4)/3 = 4.67.

If we add 10 to each observation, we get 13, 17, and 14. The new mean is,

(13+17+14)/3 = 14.67,

which is the original mean plus 10. However, the differences between each observation and the mean remain the same

(13-14.67 = -1.67, 17-14.67

= 2.33, and

14-14.67 = -0.67),

Meaning the spread has not changed, and thus the standard deviation remains the same.

1 liter = 100 centiliter

0.31 * 100 = 31

31 centiliters = 0.31 liters

1 liter = 100 centiliter

0.31 * 100 = 31

31 centiliters = 0.31 liters

To write 5 - 2y = 3x in standard form, you rearrange it to Ax + By = C, resulting in the equation 3x - 2y = -5, which is in standard form as requested.

To write the equation 5 - 2y = 3x in standard form, you want to arrange it to Ax + By = C, where A, B, and C are integers, and A should not be negative. Here's how you can do it:

Thus, the standard form of the equation is 3x - 2y = -5.

The algebraic expression for '3 less than twice the sum of a number and 4' where x is the unknown number is

'2(x + 4) - 3'.

The algebraic expression for the verbal statement "3 less than twice the sum of a number and 4" can be written as follows:

First, let's represent the unknown number by x. The phrase 'the sum of a number and 4' translates to x + 4. 'Twice this sum' means we multiply the expression by 2, resulting in 2(x + 4). Finally, '3 less than' indicates that we need to subtract 3 from this expression. Therefore, the complete algebraic expression is 2(x + 4) - 3.

Answer:

The slope of the line is 1/2.

Step-by-step explanation:

2 x − 4 y = 10 (Subtract  2 x from both sides.)

− 4 y = − 2 x + 10 (Divide both sides by -4.)

y = − 2 x − 4 + 10 − 4  (Simplify.)

y = 1/2 x − 5 /2

y=1/2

Answer:

the slope is equal to [tex]\frac{1}{2}[/tex]

Step-by-step explanation:

we have

[tex]2x-4y=10[/tex] -----> equation of the line in standard form

we know that

The equation of the line into slope intercept form is equal to

[tex]y=mx+b[/tex]

where

m is the slope

b  is the coordinate y of the y-intercept

Convert the equation of the line into slope intercept form

[tex]2x-4y=10[/tex] -----> isolate the variable y

[tex]4y=2x-10[/tex]

[tex]y=\frac{2}{4}x-\frac{10}{4}[/tex]

Simplify

[tex]y=\frac{1}{2}x-\frac{5}{2}[/tex]

therefore

the slope is equal to

[tex]m=\frac{1}{2}[/tex]

To simplify the expression (3b^3)^4, raise the base to the fourth power and simplify the exponent.

To simplify the expression (3b^3)^4, we need to raise the base, 3b^3, to the fourth power. This can be done by multiplying the exponents. The result is 3^4 * (b^3)^4, which simplifies to 81b^12.

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The solution to the inequality x - 7.67 ≥ 8.4 is x ≥ 16.07, which is found by isolating x on one side of the inequality.

To solve this inequality, we need to isolate x on one side. The inequality is x - 7.67 ≥ 8.4. To get x by itself, we have to remove 7.67 from the left side of the inequality. We can do that by adding 7.67 to both sides of the inequality.

So, the revised equation is x - 7.67 + 7.67 ≥ 8.4 + 7.67. After simplifying, we get x ≥ 16.07. This is the solution to the inequality.

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Answer:

C. The difference in length between Cassie’s longest and shortest practice sessions was greater than the difference in length between Jacqueline’s longest and shortest sessions.

Step-by-step explanation:

To calculate the probability that at least one dog will be adopted out of nine visits to an animal shelter, given a single visit adoption probability of 0.20, you use the complementary probability principle: 1 minus the probability of no adoptions in nine visits (0.80^9).

The question asks to calculate the probability that at least one dog will be adopted out of nine visits to an animal shelter, given that the probability of adopting a dog on any visit is 0.20. To find this, we need to use the concept of complementary probability, which states that the probability of at least one event occurring is equal to 1 minus the probability of the event not occurring at all. Here, the event not occurring at all means no dogs are adopted in nine visits.

First, let's find the probability of not adopting a dog on a single visit, which is 1 - 0.20 = 0.80. Next, to find the probability of not adopting a dog in nine visits, we raise this number to the ninth power: 0.80^9. Lastly, to find the probability of at least one adoption in nine visits, we subtract this value from 1.

So, the calculation goes as follows:

Performing the arithmetic gives us the answer.

multiply speed by time to get distance

70 *8.5 = 595 miles

Answer:

The slope of the line passing through these points is 3.

Step-by-step explanation:

A first order function is given by the following formula:

[tex]y = ax + b[/tex]

In which a is the slope.

In this problem, we have that:

The line passes through the point (5,5). This means that when x = 5, y = 5. So

[tex]5a + b = 5[/tex]

[tex]b = 5 - 5a[/tex]

The line also passes through the point (6,8). This means that when x = 6, y = 8. So:

[tex]6a + b = 8[/tex]

[tex]b = 5 - 5a[/tex]

So

[tex]6a + 5 - 5a = 8[/tex]

[tex]a = 3[/tex]

The slope of the line passing through these points is 3.

The required formula is  y = 6x e⁻ˣ for a function of the form y=bxe^−ax with the local maximum at (1,2.2073).

A function curve has peaks known as maxima. There can be an unlimited number of peaks.

The given function of the form as:

y = bxe⁻ᵃˣ   y' = be⁻ᵃˣ  (1-ax)

Plug point (x,y) = (1, 2.2073) into equation:  2.2073 = 6be⁻ᵃ

Now plug in y' = 0 at the same x value:  0 = be-6ᵃ(1-6a) or a = 1

and y' = be⁻ᵃ(-a + 1) = 0  giving a = 1

From first equation  2.2073 = b e⁻¹ so b = 2.2073e =  6

So the required formula is  y = 6x e⁻ˣ

To find b, plug an into the first equation. The sign of the first derivative shifts from + to -, indicating that it is a maximum critical point.

You may graph the equation using your constants and observe that the point (1, 2.2073) is the maximum.

Therefore, the required formula is  y = 6x e⁻ˣ.

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You would end up paying $2.84 in sales tax.

63.20*0.45=$2.84.

Hope this helps!

4.5% = 0.045

63.20 x 0.045 = 2.844

tax = $2.84

let cat food = x

 total plus 5% = 105% = 1.05

1.05 * (11.50 + X) = 16.80

12.075 + 1.05x = 16.80

1.05x = 16.80-12.075

1.05x = 4.725

x = 4.725 / 1.05

x= 4.50

 the cat food cost $4.50

11.50 +4.50 = 16.00

16.00 * 0.05 = 0.80

16.00 + 0.80 = 16.80