SOLUTION: The Height of a projectile above the ground is described by the function P(t)=-16t^2+640t -When will the projectile get back to the ground, height = 0? -When will the projectil

Question 766803: The Height of a projectile above the ground is described by the function P(t)=-16t^2+640t
-When will the projectile get back to the ground, height = 0?
-When will the projectile be 3696 feet above ground?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
The Height of a projectile above the ground is described by the function P(t)=-16t^2+640t
-When will the projectile get back to the ground, height = 0?
P(t)=-16t^2+640t = 0
Solve for t
===========================
-When will the projectile be 3696 feet above ground?
P(t)=-16t^2+640t = 3696
Solve for t
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