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Talja [164]
3 years ago
11

A sector of a circle has a central angle measuring 80 degrees. If the area

Mathematics
1 answer:
marysya [2.9K]3 years ago
6 0

Answer:

675in

Step-by-step explanation:

not it

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The range of the function f(x) = x + 5 is {7, 9}. What is the function’s domain?
Delicious77 [7]

Answer:

Step-by-step explanation:

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3 years ago
How many weeks of data must be randomly sampled to estimate the mean weekly sales of a new line of athletic footwear? We want 98
Irina18 [472]

Answer:

n=(\frac{2.33(1400)}{400})^2 =66.50 \approx 67

So the answer for this case would be n=67 rounded up

Step-by-step explanation:

Information given

\bar X represent the sample mean for the sample  

\mu population mean

\sigma=1400 represent the sample standard deviation

n represent the sample size  

Solution to the problem

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}    (a)

And on this case we have that ME =400 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (b)

The critical value for 98% of confidence interval now can be founded using the normal distribution. And the critical value would be z_{\alpha/2}=2.33, replacing into formula (b) we got:

n=(\frac{2.33(1400)}{400})^2 =66.50 \approx 67

So the answer for this case would be n=67 rounded up

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myrzilka [38]

Answer:

July

Step-by-step explanation:

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M is the midpoint of CF (line over it) for the points C(3,4) and F(9,8). Find MF
elena55 [62]
(\frac{x_{1} + x_{2}}{2}, \frac{y_{1} + y_{2}}{2}) \\(\frac{3 + 9}{2}, \frac{4 + 8}{2}) \\(\frac{12}{2}, \frac{12}{2}) \\(6, 6)

Midpoint of CF: (6, 6)
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Answer:

1/6 or 1 out of 6

Step-by-step explanation:

In total there are 6 different thingthings it could land on.

Out of the 6 there is 1 chance of getting red heads.

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