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Anon25 [30]
3 years ago
12

(PLEASE HELP) What is the area of a circle with a radius of 8 units

Mathematics
2 answers:
ladessa [460]3 years ago
8 0

Answer:

A = 64π units = about 201.06 units

Step-by-step explanation:

The formula for area is

A = πr^2, where r=radius.

Plug in our radius to get the area!

A = π8^2

<u>A = 64π = about 201.06 units</u>

drek231 [11]3 years ago
5 0
Area = 201.06 if radius = 8
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Answer:

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Step-by-step explanation:

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3 years ago
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x P(x) 0 0.25 1 0.3 2 0.1 3 0.35 Find the standard deviation of this probability distribution. Give your answer to at least 2 de
barxatty [35]

Answer:

The standard deviation of this probability distribution is 1.2.

Step-by-step explanation:

We have that:

P(X = 0) = 0.25

P(X = 1) = 0.3

P(X = 2) = 0.1

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Each value multiplied by its probability. So

M = 0*0.25 + 1*0.3 + 2*0.1 + 3*0.35 = 1.55

Variance:

Sum of the squares of the values subtracted from the mean, and multiplied by its probability.

V = 0.25*(0-1.55)^2 + 0.3*(1-1.55)^2 + 0.1*(2-1.55)^2 + 0.35*(3-1.55)^2 = 1.4475

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Square root of the variance. So

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The standard deviation of this probability distribution is 1.2.

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3 years ago
The band at Crest Elementary School has 9 flutes, 6 clarinets, 3 trumpets, 2 trombones, 1 tuba, and 3 French horns. If one instr
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Solve for x. 3/4 = x/12 <br> I need work shown to
marta [7]

\frac{3}{4} = \frac{x}{12}

To solve for x you have to bring the 12 to the other side

How  do we do this?

Well if you think about it this is technically what the equation shows

\frac{3}{4} = x * \frac{1}{12}

This means to isolate x you can multiply both sides by 12 and that will cancel \frac{1}{12} from the right side

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\frac{36}{4} can be further simplified to...

9

^^^This is the answer

Check:

3/4 = 9/12

3/4 = 3/4

Hope this helped!

~Just a girl in love with Shawn Mendes

4 0
3 years ago
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Alja [10]

Answer:3.84x10^10

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