Need help

Need help with question please
Asking for help and asking someone to solve your problem for you are not the same. Don't you see that? In any case, let me know which one you want so I can answer your request.
 
Need help with question please
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Since t is defined as the time after the ball was hit, when the ball is hit, t=0. They are asking you to find h(0).

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The are asking for h and t at the vertex of the function. When a function is written in the form they gave, this is particularly easy. What have you been taught about that?

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The ground is at h=0, so they are asking you to solve the equation h(t) = 0 for t. Replace h with 0 and solve. (Again, it's written in a way that makes this easy to do.)
 
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