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Math Help - Can someone help me with rate of change??

  1. #1
    Junior Member
    Joined
    Sep 2008
    Posts
    43

    Can someone help me with rate of change??

    The problem is:
    If h(t) represents the height of an object above ground level at time t and h(t) is given by: h(t)= -16t^2 + 12t + 1. FInd the height of the object at the time when the speed is zero.

    Also I dont understand the whole prime thing. For example, how would the following question be solved:
    Suppose G(x)= 4x^2 + x + 4. Find a number B such that G'(b)=7.
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  2. #2
    Banned
    Joined
    Sep 2008
    Posts
    34
    dewd you need to go to class


    lim h->0 [f(x+h) - f(x)]/h

    '
    take your derivative of h(t). h'(t)= -18t + 12. set it equal to zero, can you figure that out?

    do the same thing for the next one.
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