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Elza [17]
3 years ago
6

CHOOSE THE NUMBER STATEMENT BELOW THAT IS CORRECT

Mathematics
1 answer:
tiny-mole [99]3 years ago
5 0

Answer:

what number statement

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Only one left pls help me im confused
lidiya [134]

Answer:

B

Step-by-step explanation:

I'm pretty sure it is B but if not I'm sorry

3 0
3 years ago
Read 2 more answers
a 50 ft pole has a support wire that runs from its top to the ground with an angle of depression of 75°. How far from the base o
lukranit [14]
The height of the pole is the vertical leg of the right triangle. The angle of depression is an exterior angle to the triangle at its upper angle. The angle of depression is complementary to the interior angle, so the measure of the interior angle is 15. The base angles are 90 and 75. Use the tangent ratio now, using the base angle of 75 and the height of the pole being 50: tan75=50/x.
Make sure your calculator is in degree mode to do this and get that x = 13.4
4 0
4 years ago
A simple random sample (SRS) of 150 is taken from a population with a 0.6 proportion of success. An independent SRS of 250 is ta
Virty [35]

Answer:

SE_{\hat p_1 -\hat p_2}= \sqrt{\frac{0.6(1-0.6)}{150}+\frac{0.3(1-0.3)}{250}}= 0.0494

Step-by-step explanation:

For this case we have the following data:

n_1 =150 represent the random sample 1 selected

\hat p_1 =0.6 represent the proportion of success for the sample 1 selected

n_2 =250 represent the random sample 2 selected

\hat p_2 =0.3 represent the proportion of success for the sample 2 selected

We know for this case that we can use the normal approximation since for both cases we have:

n_1 p_1  =90 \geq 10, n_1 (1-p_1)=60 \geq 10

n_2 p_2  =75 \geq 10, n_2 (1-p_2)=175 \geq 10

We have the randomization condition and we assume that the two samples are <10% of the entire population size.

So then we can use the following distribution for the proportions:

p \sim N( \hat p, \sqrt{\frac{\hat p (1-\hat p)}{n}})

For this case we want to find the distribution for the difference of these two proportions and we have this:

p_1 -p_2 \sim N (\hat p_1 -\hat p_2 , \sqrt{\frac{\hat p_1 (1-\hat p_1)}{n_1} +\frac{\hat p_2 (1-\hat p_2)}{n_2}})

So then the dtandard deviation would be given by:

SE_{\hat p_1 -\hat p_2}= \sqrt{\frac{0.6(1-0.6)}{150}+\frac{0.3(1-0.3)}{250}}= 0.0494

4 0
4 years ago
Read 2 more answers
Find the length of the missing side <br>The length of the missing side is​
givi [52]

Answer:

52 m

Step-by-step explanation:

a^2 + b^2 = c^2

a^2 + 39^2 = 65^2

a^2 + 1521 = 4225

4225 - 1521 = 2704

Square root of 2704 = 52

7 0
3 years ago
Read 2 more answers
Students are given 3 minutes to complete each multiple-choice question on a test and 8 minutes for each free-response question.
Naddika [18.5K]

Answer:

x=16

Step-by-step explanation:

From the Free Response Row,

  • 8(15-m)=x

For the Total Time(in minutes) column

  • 3m+x=55
  • x=55-3m

Since x=55-3m and x=8(15-m)

Therefore:

55-3m =8(15-m)

55-3m=120-8m

Collect like terms

-3m+8m=120-55

5m=65

Divide both sides by 5

m=13

Therefore:

x=55-3m=55-3(13)=55-39

x=16

6 0
3 years ago
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