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a boy is blowing a spherical balloon at a rate of 50 cm3/ what rate is the radius of the balloon changing when the radius is 10 cm?give your answer to 2 decimal places.

  • math -

    I assume you do calculus.

    V= 4/3 PI r^3
    dV/dt= 4 PI r^2 dr/dt

    you are given dV/dt= 50cm^3/s; find dr/dt

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