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NARA [144]
3 years ago
7

I need help answering these questions, methods appreciated on how to do each one.

Mathematics
1 answer:
xxMikexx [17]3 years ago
4 0

Answer:

get rickrolled

Step-by-step explanation:

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To find the volume of a sphere:
 \frac{4}{3} *3.14*R^3

3.14≈π

Now since its telling us to use π, then we do our formula by multiplying by π.

π=3.14 (Approximate amount)

So:

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leonid [27]
<span>−1.2z − 8.2 > −9.7</span>
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3 years ago
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Zinaida [17]
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3 years ago
David can paint a fence in ten hours. Alex can paint the same fence in eight hours. If
xxTIMURxx [149]

Answer:

40/9

Step-by-step explanation:

Use the work formula, \frac{1}{A} + \frac{1}{B} = \frac{1}{T}, where A is the amount of time it takes one person, B is the amount of time it takes another person, and T is the time it takes for them to work together.

Plug in the times for David and Alex alone:

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Find the least common denominator, which is 40.

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Cross multiply and solve for T:

9T = 40

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