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  • 4 months ago
    Favourite answer

    M = x³ + 0.1x⁴

    so, dM/dt = 3x².dx/dt + 0.4x³.dx/dt

    Then, with x = 6 and dx/dt = 0.05 we get:

    dM/dt = 3(6)²(0.05) + 0.4(6)³(0.05)

    i.e. dM/dt = 108(0.05) + 86.4(0.05)

    => dM/dt = 9.72 grams/hour

    :)>

  • Bryce
    Lv 7
    4 months ago

    9.72                

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