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Oliga [24]
4 years ago
14

HELP!

Mathematics
1 answer:
aivan3 [116]4 years ago
5 0

Answer:

1) 59.7  2) 7.1

Step-by-step explanation:

1)The diameter of a circle is 19 m. Find the circumference to the nearest tenth

The equation to find the circumference for a circle is C=2πR or C = πD. The diameter is equal to 2r so that is why the equation works either way. Now we will plug in the numbers. C =19π. This is approximately equal to 59.6902604182 which is approximately equal to 59.7

2)AND the diameter of a circle is 3ft. Find its area to the nearest tenth.

As stated before the diameter is equal to 2r. The area of a circle is calculated using the equation πr^2. First we need to find the radius which is 1/2D. 3/2 = r or 1.5 = r. Now we can plug all values in. A = π1.5^2 which equals to 2.25π which equals to 7.06858347058 which is approximately 7.1.

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