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Sliva [168]
3 years ago
7

Find the surface area of a sphere with a diameter of 32 mm. Express your answer in terms of π.

Mathematics
2 answers:
Naddika [18.5K]3 years ago
6 0
<span>B. 1,024π mm2.

I hope helped.

good luck to you
</span>
Dmitry [639]3 years ago
5 0
<span>Sphere Surface Area     =    <span> 4 • <span>π • r²</span></span></span><span>
radius = 16mm
</span><span>Sphere Surface Area     =    <span> 4 • <span>π <span>• 16²
Sphere Surface Area     =    </span></span></span></span><span>4 • <span>π <span>• 256
</span></span></span>Sphere Surface Area     =  1,024 <span><span>• <span>π
Answer is B

</span></span>

</span>
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2 years ago
Write the word sentence as an equation. Then solve the equation.
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Answer: <em>n </em>-<em> 4 = -15</em>

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If -15 is the same as 4 less than <em>n, </em>that means that <em>n </em>- 4 = -15

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Suppose ten students in a class are to be grouped into teams. (a) If each team has two students, how many ways are there to form
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Answer:

(a) There are 113,400 ways

(b) There are 138,600 ways

Step-by-step explanation:

The number of ways to from k groups of n1, n2, ... and nk elements from a group of n elements is calculated using the following equation:

\frac{n!}{n1!*n2!*...*nk!}

Where n is equal to:

n=n1+n2+...+nk

If each team has two students, we can form 5 groups with 2 students each one. Then, k is equal to 5, n is equal to 10 and n1, n2, n3, n4 and n5 are equal to 2. So the number of ways to form teams are:

\frac{10!}{2!*2!*2!*2!*2!}=113,400

For part b, we can form 5 groups with 2 students or 2 groups with 2 students and 2 groups with 3 students. We already know that for the first case there are 113,400 ways to form group, so we need to calculate the number of ways for the second case as:

Replacing k by 4, n by 10, n1 and n2 by 2 and n3 and n4 by 3, we get:

\frac{10!}{2!*2!*3!*3!}=25,200

So, If each team has either two or three students, The number of ways  form teams are:

113,400 + 25,200 = 138,600

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3 years ago
(2.3x10^4)x(1.5x10^-2
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here's the solution luv

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3 years ago
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What is the answer? ​
lisov135 [29]

Answer:

B is the answer

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2 years ago
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