Please help me with this math problem!

Posted on 2013-11-27 13:49:00 in Math by ADDY

I got this question as part of an assignment and I can't for the life of me figure it out! Could somebody please help me out?



A projectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = - 16t² + 640t. After how many seconds does the projectile take to reach its maximum height?



I made the function look more normal to understand it better: f(x) = - 16x² + 640x

Please show your work, if possible, so I can understand how it's done.

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