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PSYCHO15rus [73]

3 years ago

8

Find the arc length of the partial circle. Either intern exact answer in terms of pi or use 3.14 for pi and into your answer as

a decimal.

1 answer:

Murljashka [212]3 years ago

6 0

Answer:

Sure it gonna be 10.99 units

Step-by-step explanation:

OK so u have to

$(90/360)*2\pi \: r$

So ur radius is de r=7

Then continue and u shld get 10.99......

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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

What is the airplane's rate in miles per hour?

Shkiper50 [21]

The rate of the airplane is 300mph per hour.

3 0

2 years ago

Football helmets

horsena [70]

Answer:

They can buy 24 helmets.

Step-by-step explanation:

1 helmet = $15

$369 divided by $15 --> 24.6 --> 24 helmets

5 0

2 years ago

6/9 in two different forms

maw [93]

Word form: Six over nine or two over three

Simpliest form: 2/3

3 0

2 years ago

Change the fraction 5/2 to percent

kap26 [50]

[ Answer ]

$\boxed{250 \ Percent}$

[ Explanation ]

Change $\frac{5}{2}$ To Percent

-------------------------------------

$\frac{5}{2}$ Is The Same As 5 ÷ 2

Divide

5 ÷ 2 = 2.5

Convert Decimal To Percentage

2.5 · 100 = 250

Final Answer

250%

$\boxed{[ \ Eclipsed \ ]}$

4 0

3 years ago