SOLUTION: A mortar shell is s feet above the ground after t seconds, where s = f(t) = -16t^2 + 512t + 64. Find the height of the shell 30 seconds after it is fired. (Simplify the answer as m

Algebra ->  Linear-equations -> SOLUTION: A mortar shell is s feet above the ground after t seconds, where s = f(t) = -16t^2 + 512t + 64. Find the height of the shell 30 seconds after it is fired. (Simplify the answer as m      Log On


   

Question 259732: A mortar shell is s feet above the ground after t seconds, where s = f(t) = -16t^2 + 512t + 64. Find the height of the shell 30 seconds after it is fired. (Simplify the answer as much as possible.)

Could someone help me with this problem?
Thank you.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
plug in 30 for t
s=-16t^2 + 512t + 64
s = -16 (t^2-32 t-4)
s = -16*(30^2-32(30)-4)
s = -16(-2(30)-4)
s=-16*(-64)
s=1024