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21 October, 14:29

A catalog of scientific equipment states that the lens of a particular telescope has an area of 3.14 square feet. What is the lens's circumference?

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  1. 21 October, 14:59
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    Answer: 6.28 feet

    Step-by-step explanation:

    Area of the lens = πr^2

    Since area has been given as 3.14

    3.14 = πr^2

    Note that π = 3.14

    3.14 = 3.14r^2

    r^2 = 3.14/3.14

    r^2 = 1

    r = ✓1

    r = 1

    The radius of the lens is 1

    Circumference of the lens = 2πr

    = 2 * 3.14 * 1

    = 6.28 feet
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