Ask question

Ask question

All categories

3 years ago

5

A surveyor measures the top of a lighthouse 70ft away from him (see picture). his angle-measuring device is 4 ft above the groun

d. The angle of elevation to the top of the building is 50 degrees. how tall is the lighthouse to the nearest foot?

1 answer:

mezya [45]3 years ago

5 0

Answer: 45

Step-by-step explanation:

You might be interested in

Four bags of puppies show dog food weight 142 pounds what is the weight in one pound of one bag of the puppy chow dog food

MariettaO [177]

Answer:

I think youre trying to ask the weight of one of the bags

Step-by-step explanation:

the answer is 35.5 you take the total weight and divide it by the number of bags hope this helps

4 0

3 years ago

You rent an apartment that costs $1700 per month during the first year, but

nika2105 [10]

Answer:

it's 2910 an answer ?

Step-by-step explanation:

110×11 = 1210

4 0

3 years ago

Read 2 more answers

Which statement is true?

bearhunter [10]

Answer:

what do you mean by that

4 0

4 years ago

A manufacturer receives parts from two suppliers. An SRS of 400 parts from supplier 1 finds 20 defective; an SRS of 100 parts fr

jeyben [28]

Answer:

Option C) 0.0602

Step-by-step explanation:

We are given the following in the question:

$x_1 = 20\\n_1 = 400\\x_2 = 10\\n_2 = 100$

Let p1 and p2 be the proportion of all parts from suppliers 1 and 2, respectively, that are defective.

$p_1 = \dfrac{x_1}{n_1} = \dfrac{20}{400} = 0.05\\\\p_2 = \dfrac{x_2}{n_2} = \dfrac{x_2}{n_2} = \dfrac{10}{100}= 0.1$

First, we design the null and the alternate hypothesis

$H_{0}: p_1 = p_2\\H_A: p_1 \neq p_2$

We use Two-tailed z test to perform this hypothesis.

Formula:

$\text{Pooled P} = \dfrac{x_1+x_2}{n_1+n_2}\\\\Q = 1 - P\\\\Z_{stat} = \dfrac{p_1-p_2}{\sqrt{PQ(\frac{1}{n_1} + \frac{1}{n_2})}}$

Putting all the values, we get,

$\text{Pooled P} = \dfrac{20+10}{400+100} = 0.06\\\\Q = 1 - 0.06 = 0.94\\\\Z_{stat} = \dfrac{0.05-0.1}{\sqrt{0.06\times 0.94(\frac{1}{400} + \frac{1}{100})}} = -1.883$

Now, we calculate the p-value from the table at 0.05 significance level.

P-value = 0.0602

Thus, the correct answer is

Option C) 0.0602

7 0

4 years ago

WILL GIVE A BRAINLIEST TO THE CORRECT ANSWER!!

shutvik [7]

Hmm, I would go for Inequality.

6 0

4 years ago