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The rate of change R, in kilometers per hour, of the altitude of a hot air balloon is given by R(t)=t^3-4t^2+6 for time on the interval [0,4], where t is measured in hours. Assume the balloon is on ground level.

What is the maximum altitude of the balloon during the interval [0,4]?

  • Calculus -

    Find dR/dt, set equal to zero, find time. PUt that in the original equation for altitude.


    t=0, t= 8/3 sec

    Rmax=R(8/3)= you do it.

  • Calculus -


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