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2 years ago

HELP PLSSSSS

Mathematics

1 answer:

Ipatiy [6.2K]2 years ago

5 0

Answer: 11.4 feet of the ground

Step-by-step explanation:

You would use sin to get the answer. So it'd be sin(72) = x/12

Once you get the sin you would multiply it by the 12 to get the x by itself and that's your answer.

It would be sin because the question is asking for that side, and it's across the 72, making it the opposite side, the side that is across from the 90 degrees is always the hypotenuse and you have a number for that side and sin uses the opposite and hypotenuse

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What is 50 cubed help quick please worth 100 points

mina [271]

Answer: 125 000

Step-by-step explanation:

50^3 is equal to 50 * 50 * 50

or 50 times itself 3 times

which equals 50 * 50 * 50 = 125000

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2 years ago

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What is -3.2 + (1 1/2) + (-2)

CaHeK987 [17]

Answer:

-3.7

Step-by-step explanation:

-3.2 + 1.5 -2 = -3.7

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A sales representative for a baby food company wants to survey 300 random couples who are new parents to find out if their newbo

AleksAgata [21]

Answer:

A. Yes, because each of the two outcomes are equally likely.

Step-by-step explanation:

A sales representative for a baby food company wants to survey 300 random couples who are new parents to find out if their newborn child is a boy or a girl.

The representative uses a 1 for a girl and a 2 for a boy when running a simulation.

Yes, the simulation will be a fair representation of possible survey results.

A. Yes, because each of the two outcomes are equally likely.

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3 years ago

What does this mean? Its REALLY important I get this right.

ivann1987 [24]

The correct answer is Option A

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3 years ago

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In a sample of 88 adults selected randomly from one town, it is found that 6 of them have been exposed to a particular strain of

Ivan

<h2>Answer with explanation:</h2>

Let p be the proportion of of all adults in the town that have been exposed to this strain of the flue .

As per given , we have

$H_0:p=0.08\\\\ H_a: p\neq0.08$

∵ $H_a$ is two-tailed , so the test is a two-tailed test.

Test statistic :

$z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

, where p= population proportion

${\hat{p}$ = sample proportion

n= sample size

Put n= 6 and ${\hat{p}=\dfrac{6}{88}\approx0.068$ and p=0.08

$z=\dfrac{0.068-0.08}{\sqrt{\dfrac{0.08(1-0.08)}{88}}}$

$z=\dfrac{-0.012}{0.0289199522192}\approx-0.415$

P-value for two-tailed test : 2P(Z>|z|)

=2P(Z>|-0.415|)

=2P(Z>0.415)

=2[1-P(Z≤0.415)] [∵ P(Z>z)=1-P(Z≤z)]

=2(1-0.6609) [ by z-table]

=0.6782

Decision : Since the p-value(0.6782) is > significance level(0.01) , so we fail to reject the null hypothesis.

We conclude that that we do not have sufficient evidence to support the claim that the proportion of all adults in the town that have been exposed to this strain of the flue differs from the nationwide percentage of 8%.

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3 years ago