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2 years ago

Find the exact area of the circle with circumference = 30pi

Mathematics

1 answer:

34kurt2 years ago

4 0

Step-by-step explanation:

Circumference of the circle= 30π units

$2\pi \: r = 30\pi$

$r = 15 \: units$

Area of the circle =

$\pi {r}^{2} = \pi {15}^{2}$

= π225 sq. unit

=3.14× 225 sq. units

=706.5 sq units

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Answer:

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2 years ago

Solve for u.<br> |5u + 15| = 10

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Answer:

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Step-by-step explanation:

You must account for negative u values (which the abs nullifies).

So $5u+15=10$ and $5u+15=-10$ is what we have to solve for.

As for usual equations, isolate the u variable.

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Now you can do the same operation for the other equation and you should get u = -5.

Let's make sure we did it right by replacing u with one of our solutions (-1 or -5).

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That's true. What about the other one?

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2 years ago

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Step-by-step explanation:

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