if y varies directly as the square root of x and y=87 when x=625, find y if x =390625. Round off your answer to the nearest hundredth

Question

if y varies directly as the square root of x and y=87 when x=625, find y if x =390625. Round off your answer to the nearest hundredth

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Hồng Cúc 3 years 2021-08-22T05:01:03+00:00 1 Answers 27 views 0

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  1. Ben
    0
    2021-08-22T05:02:21+00:00
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    Answer:

    2175

    Step-by-step explanation:

    y = k sqrt(x)

    x = 625

    y = 87

    87 = k * sqrt(625)

    87 = k * 25

    87/25 = k

    k = 3.48

    y = 3.48 * sqrt(390625)

    y = 3.48 * 625

    y = 2175

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