A softball is thrown up into the air. The ball's height in feet is modeled by the equation h(t) = -16t2 + 32t + 5.
h = height
t = time in seconds
Find the maximum height of the ball.
a) 13.9 feet
b) 8.3 feet
c) 12.2 feet
d) 7.6 feet

Question

A softball is thrown up into the air. The ball's height in feet is modeled by the equation h(t) = -16t2 + 32t + 5.
h = height
t = time in seconds
Find the maximum height of the ball.  
 a) 13.9 feet 
 b) 8.3 feet 
 c) 12.2 feet 
 d) 7.6 feet

anonymous · Answer

should be 21 feet, try plot it on ur calculator. All ur options given seem to be incorrect.

anonymous · Answer

Note that the height function is a quadratic.  The vertex of the parabolic graph for such a function is at x=-b/2a=1.  The maximum value for the function occurs at this point, i.e., h(1)=-16+32+5=21.  As far as I can tell, the correct answer is not listed.