a round mirror has a circumference of 87.92 inches. calculate the area of the mirror. use 3.14 for pi. round answers to the nearest hundreth

Question

a round mirror has a circumference of 87.92 inches. calculate the area of the mirror. use 3.14 for pi. round answers to the nearest hundreth if necessary

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Nguyệt Ánh 5 years 2021-08-19T19:17:20+00:00 1 Answers 12 views 0

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  1. thaiduong
    0
    2021-08-19T19:18:51+00:00
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    Answer:

    615.44 in²

    Step-by-step explanation:

    Use the circumference formula, C = 2\pir

    Plug in the circumference and pi to solve for the radius, r:

    C = 2\pir

    87.92 = 2(3.14)r

    87.92 = 6.28r

    14 = r

    Then, use the area formula, A = \pir²

    A = 3.14(14)²

    A = 615.44 in²

    So, the area of the mirror is 615.44 in²

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