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3 years ago

Solve this problem using estimation.

2 answers:

5 0

For Ramona to know how much she expects to pay for the carpet she is ordering, she first needs to know how many square foot the the room has.
In getting the area of the room, you multiply one side with the other,
in equation,

19.5 ft x 41.6 ft = 811.2 sq ft.

Then if the carpet costs $9.50 per sq ft, you simply multiply it the area of the room
in equation,

$9.50/ sq ft. x 811.2 sq ft, cancelling out the unit of sq ft
the answer would be $7,706.4

Katarina [22]3 years ago

3 0

Answer:

Step-by-step explanation:

For Ramona to know how much she expects to pay for the carpet she is ordering, she first needs to know how many square foot the the room has.

In getting the area of the room, you multiply one side with the other,

in equation,

19.5 ft x 41.6 ft = 811.2 sq ft.

Then if the carpet costs $9.50 per sq ft, you simply multiply it the area of the room

in equation,

Read more on Brainly.com - brainly.com/question/1414540#readmore

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Express as fraction in simplest form

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As a percent: 2.5%

As a decimal: .025

As a fraction: 25/1000

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3 years ago

Given: AB=CD, BD=DE<br> Prove: AD=CE

labwork [276]

This question is incomplete. Can you maybe add more information?

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3 years ago

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A candidate for a US Representative seat from Indiana hires a polling firm to gauge her percentage of support among voters in he

UkoKoshka [18]

Answer:

a) The minimum sample size is 601.

b) The minimum sample size is 2401.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

For this problem, we have that:

We dont know the true proportion, so we use $\pi = 0.5$ , which is when we are are going to need the largest sample size.

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

a. If a 95% confidence interval with a margin of error of no more than 0.04 is desired, give a close estimate of the minimum sample size that will guarantee that the desired margin of error is achieved. (Remember to round up any result, if necessary.)

This is n for which M = 0.04. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.04 = 1.96\sqrt{\frac{0.5*0.5}{n}}$

$0.04\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.04}$

$(\sqrt{n})^2 = (\frac{1.96*0.5}{0.04})^2$

$n = 600.25$

Rounding up

The minimum sample size is 601.

b. If a 95% confidence interval with a margin of error of no more than 0.02 is desired, give a close estimate of the minimum sample size necessary to achieve the desired margin of error.

Now we want n for which M = 0.02. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.02 = 1.96\sqrt{\frac{0.5*0.5}{n}}$

$0.02\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.02}$

$(\sqrt{n})^2 = (\frac{1.96*0.5}{0.02})^2$

$n = 2401$

The minimum sample size is 2401.

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3 years ago

20PTS Question On Pic Thx

harina [27]

Answer:

(a) $3800

(b) (a) -- April to May

Step-by-step explanation:

The least amount is found at the lowest point on the graph. That point is in May. It is on the line between 3700 and 3900, so the amount is $3800.

The least donation amount is a month is $3800.

The greatest month-to-month decrease is found where the line on the graph has the steepest negative slope. There are two segments with negative slope:

April - May (decrease of $500)
June - July (decrease of $100)

The decrease from April to May is by far the largest of these two decreases.

The greatest decrease occurred April to May.

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2 years ago

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What is the range of the function shown on the graph above?

AleksandrR [38]

Answer:

-9≤y≤8

Step-by-step explanation:

The range is the output values

Y goes from -9 to 8

-9≤y≤8

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3 years ago