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Svetach [21]
1 year ago
7

Find the area of a circle with a circumference of 12.56 units. units

Mathematics
1 answer:
Julli [10]1 year ago
3 0

ANSWER

A = 12.56 units²

EXPLANATION

The circumference of a circle is:

C=2\pi r

We know that the circumference is 12

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Simplify the expression 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 .
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Answer:

The simplified form is,

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Step-by-step explanation:

The given expression is,

=2\sqrt{20}-3\sqrt{7}+2\sqrt{5}+4\sqrt{63}

=2\sqrt{4\times 5}-3\sqrt{7}+2\sqrt{5}+4\sqrt{9\times 7}

=2(\sqrt{4}\times \sqrt{5})-3\sqrt{7}+2\sqrt{5}+4(\sqrt{9}\times \sqrt{7})

=2(2\times \sqrt{5})-3\sqrt{7}+2\sqrt{5}+4(3\times \sqrt{7})

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=6\sqrt{5}+9\sqrt{7}

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