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12 February, 18:13

Kelly made a blueberry pie. After measuring the pie tin, Kelly calculated it has an area of 78.5 square inches. What is the pie tin's diameter? (Using 3.14 as pi)

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  1. 12 February, 20:15
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    The radius is 5 in

    Step-by-step explanation:

    The area of a circle is given by the formula

    A = pi * r^2

    We know the area = 78.5 in^2 (volume would be in^3 area is in^2)

    78.5 = 3.14*r^2

    Divide each side by 3.14

    78.5/3.14 = 3.14/3.14*r^2

    25 = r^2

    Take the square root of each side

    sqrt (25) sqrt (r^2)

    5 = r
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