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3 years ago

Help ME PLEASE> IF YOU SOLVE THIS I WILL GIVE YOU BRAINLIEST AND 20 points!

Mathematics

1 answer:

NeX [460]3 years ago

5 0

0.25x² + 8.5 - 17 = 0

1)
a = 0.25
b = 8.5
c = -17

2)

- 8.5 ± √(8.5)²-4(0.25) (-17)
------------------------------------------
2(0.25)

3)

-34 ± √1428
----------------------
2

4)

-35.894 and 35.894

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Answer:

It'll take 25 hours to get to the auto shop

Step-by-step explanation:

Given

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Required

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This can be solved using Speed's formula;

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Answer:

We conclude that majority of the citizens does not feel the country could develop a way to protect itself from atomic bombs.

Step-by-step explanation:

We are given that an organization asked 1403 randomly sampled American citizens, "Do you think we can develop a way to protect ourselves from atomic bombs in case others tried to use them against us?" with 737 responding yes.

We have to conduct a test to determine that a majority of the citizens feel the country could develop a way to protect itself from atomic bombs in 1945.

Let p = percentage of citizens feel the country could develop a way to protect itself from atomic bombs in 1945.

SO, Null Hypothesis, $H_0$ : p $\leq$ 50% {means that majority of the citizens does not feel the country could develop a way to protect itself from atomic bombs}

Alternate Hypothesis, $H_A$ : p > 50% {means that majority of the citizens feel the country could develop a way to protect itself from atomic bombs}

The test statistics that will be used here is One-sample z proportion statistics;

T.S. = $\frac{\hat p-p}{{\sqrt{\frac{\hat p(1-\hat p)}{n} } } } }$ ~ N(0,1)

where, $\hat p$ = proportion of citizens responding yes in a sample of 1403 citizens = $\frac{737}{1403}$

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Therefore, we conclude that majority of the citizens does not feel the country could develop a way to protect itself from atomic bombs.

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