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3 years ago

11

A flagpole casts a 40 foot shadow. The angle of elevation grom the tip of the shadow to the tip of the flagpole is 36". How tall

is the flagpole

1 answer:

GuDViN [60]3 years ago

6 0

Answer:

45/22

Step-by-step explanation:

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Evaluate the expression -8x + 5 - 2x - 4 + 5x when x = 2 before and after simplifying.

Alex777 [14]

Answer:

Step-by-step explanation:

all we have to do is plug in 2 for x into the equation:

-8(2) + 5 -2(2) -4 + 5(2)

-16 + 5 -4 -4 + 10

-11 -8 + 10

-19 + 10

the answer is

-9

to simplify the equation we’ll combine like terms

-8x + 5 -2x -4 + 5x

-10x + 1 + 5x

-5x + 1

now we’ll plug in 2 for x

-5(2) + 1

-10 + 1

the answer is still

-9

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3 years ago

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A biker and a walker who are 150 miles apart start moving towards each other at the same time. Their speeds are 15 and 5 miles p

egoroff_w [7]

Answer:

Step-by-step explanation:

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3 years ago

A tortoise is walking in the desert. It walks for

Ghella [55]

The answer is 1.6 minutes. All you have to do is divide the distance by the rate the distance was accomplished.

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3 years ago

Several friends each had 2/5 of a bag of peanuts left over from the baseball game. They relized that they could have bought 2 fe

rosijanka [135]

5 friends went to the game because 2 divided by two fifths is five.

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4 years ago

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A sample of 1000 college students at NC State University were randomly selected for a survey. Among the survey participants, 102

cupoosta [38]

Answer:

The upper endpoint of the 99% confidence interval for population proportion is 0.13.

Step-by-step explanation:

The confidence interval for population proportion is:

$CI=\hat p\pm z_{\alpha /2}\sqrt{\frac{\hat p(1-\hat p)}{n}}$

<u>Given:</u>

<em>n</em> = 1000

$\hat p$ = 0.102

$z_{\alpha /2}=z_{0.01/2}=z_{0.005}=2.58$

*Use the standard normal table for the critical value.

Compute the 99% confidence interval for population proportion as follows:

$CI=\hat p\pm z_{\alpha /2}\sqrt{\frac{\hat p(1-\hat p)}{n}}\\=0.102\pm 2.58\times\sqrt{\frac{0.102(1-0.102)}{1000}}\\=0.102\pm0.0248\\=(0.0772, 0.1268)\\\approx (0.08, 0.13)$

Thus, the upper limit of the 99% confidence interval for population proportion is 0.13.

6 0

3 years ago