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tigry1 [53]
3 years ago
8

The area of a circle is 615.44 in2. What is the diameter of the circle? Use 3.14 for π.

Mathematics
1 answer:
Evgen [1.6K]3 years ago
5 0

Answer:

\large\boxed{C=87.92\ in}

Step-by-step explanation:

The formula of an area of a circle:

A=\pi r^2

r - radius

We have A = 615.44 in². Substitute:

615.44=\pi r^2

\pi\approx3.14

3.14r^2=615.44          <em>divide both sides by 3.14</em>

r^2=196\to r=\sqrt{196}\\\\r=14\ in

The formula of a circumference of the circle:

C=2\pi r

Substitute:

C=2\pi\cdot14=28\pi\approx28\cdot3.14=87.92\ in

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I need help with this and I don’t understand it
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4 years ago
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Answer:

√109

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