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Viktor [21]
2 years ago
15

Does anybody know this? I really need help.

Mathematics
1 answer:
ValentinkaMS [17]2 years ago
3 0

Answer:

22 is th area

Step-by-step explanation:

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What is the area of a circle with a radius of 4 ft?<br> ft² <br> (Use 3.14 for Pi.)
MA_775_DIABLO [31]

Answer:

A≈50.27ft²

Step-by-step explanation:

8 0
2 years ago
Rent and other associated housing costs, such as utilities, are an important part of the estimated costs of attendance at colleg
Anton [14]

Answer: (336.49,\ 355.51)

Step-by-step explanation:

The confidence interval for population mean is given by :-

\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

Given : Sample size : n= 314 , which is a large sample , so we apply z-test .

Sample mean : \overline{x}=346

Standard deviation : \sigma= 86

Significance level : \alpha=1-0.95=0.05

Critical value : z_{\alpha/2}=1.96

Now, a confidence interval at the 95% level of confidence will be :-

346\pm(1.96)\dfrac{86}{\sqrt{314}}\\\\\approx346\pm9.51\\\\=(346-9.51,\ 346+9.51)\\\\=(336.49,\ 355.51)

8 0
3 years ago
Gina has a jar of marbles that contains 7 blue marbles, 5 red marbles, and 8 green marbles. She randomly selects a marble, recor
BigorU [14]

The probability that Gina randomly selected two red marbles is 1/19

<u>Explanation:</u>

Total number of marbles = 7 + 5 + 8

                                          = 20

The probability of getting two red marbles in the fraction form is given as:

P(first red marble) = number of red marbles / total number of marbles

P(first red marble) = \frac{5}{20} = \frac{1}{4}

P(second red marble) = number of red marbles after 1 white marble is removed / total number of marbles after 1 red marble is removed.

P(first red marble) = \frac{4}{19}

P(two red marbles) = P(first) X P(second)

                              = \frac{1}{4} X \frac{4}{19}

                              = \frac{1}{19}

Therefore, the probability that Gina randomly selected two red marbles is 1/19

6 0
3 years ago
Which statements about the hyperbola are true? Check all that apply.
max2010maxim [7]

Answer:

1.) There is a focus at (0,4)

4.) There is an asymptote with a slope of 4/3

These are the only 2 correct.

Step-by-step explanation:

Just took the quiz od edge!

4 0
3 years ago
Read 2 more answers
What is the value of the expression (-8/9) + (-2/3) x (-4 1/2)
geniusboy [140]

\frac{4}{9}

I hope this this is what you need ..

6 0
3 years ago
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