Posted by Rebekah on Tuesday, May 7, 2013 at 7:01am.
Alice throws a ball straight up with an initial speed of 40 feet per second from a height of 5 feet?
a) Find parametric equations that model the motion of the ball as a function of time.
b) How long is the ball in the air?
c) When is the ball at its maximum height? Determine the maximum height of the ball.
Thanks

Pre Calc  Steve, Tuesday, May 7, 2013 at 9:52am
x(t) = 0
y(t) = 5 + 40t  16t^2
Now just solve for t when y=0
Find the vertex of the parabola.