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3 years ago

2 over 3 and 8 over x

Mathematics

2 answers:

siniylev [52]3 years ago

6 0

C because 3,8 is not closer to x or 2

yawa3891 [41]3 years ago

5 0

The answer should be answer d

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PTC is a substance that has a strong bitter taste for some people and is tasteless for others. The ability to taste PTC is inher

lana66690 [7]

Answer:

a) $n=\frac{0.76(1-0.76)}{(\frac{0.01}{1.64})^2}=4905.83$

And rounded up we have that n=4906

b) For this case since we don't have prior info we need to use as estimatro for the proportion $\hat p =0.5$

$n=\frac{0.5(1-0.5)}{(\frac{0.01}{1.64})^2}=6724$

And rounded up we have that n=6724

Step-by-step explanation:

We need to remember that the confidence interval for the true proportion is given by :

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

Part a

The estimated proportion for this case is $\hat p =0.76$

Our interval is at 90% of confidence, and the significance level is given by $\alpha=1-0.90=0.1$ and $\alpha/2 =0.05$ . The critical values for this case are:

$z_{\alpha/2}=-1.64, t_{1-\alpha/2}=1.64$

The margin of error for the proportion interval is given by this formula:

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

The margin of error desired is given $ME =\pm 0.01$ and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

Replacing we got:

$n=\frac{0.76(1-0.76)}{(\frac{0.01}{1.64})^2}=4905.83$

And rounded up we have that n=4906

Part b

For this case since we don't have prior info we need to use as estimatro for the proportion $\hat p =0.5$

$n=\frac{0.5(1-0.5)}{(\frac{0.01}{1.64})^2}=6724$

And rounded up we have that n=6724

3 0

3 years ago

Stan earns $12 per hour by working as an intern at a law firm. How much money does he earn in a week in which he works 28 hours?

White raven [17]

$12 per hour

He works 28 hours.

Multiply the hours by the money he makes per hour.

28 * 12 = $336

7 0

3 years ago

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1/4 + (-3/4)= <br> -4 1/2 + 2= <br> -8+ (-1 1/8) =

AlekseyPX

1/4+ (-3/4) = -0.5

-4 1/2 +2= -2.5

-8+ (-11/8)= -9.125

4 0

3 years ago

PLEASE HELP, MATH PROBLEM

SSSSS [86.1K]

C because the slope of f(x) is -2, and the slope of g(x) is -7

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2 years ago

Angles 1 and 2 are supplementary

Dvinal [7]

Answer:

Read below

Step-by-step explanation:

I don't understand the answer choices, but supplementary angles add up to 180°. It looks like the third option is correct.

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3 years ago

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