Tiffany kicks a soccer ball off the ground and in the air, with an initial velocity of 28 feet per second. Using the formula H(t) = -16t2 + vt + s, what is the maximum height the soccer ball reaches?

15.6 feet
14.1 feet
13.5 feet
12.3 feet

Question

Tiffany kicks a soccer ball off the ground and in the air, with an initial velocity of 28 feet per second. Using the formula H(t) = -16t2 + vt + s, what is the maximum height the soccer ball reaches? 

 15.6 feet
 14.1 feet
 13.5 feet 
12.3 feet

triciaal · Answer

v = 28
  maximum height at t/2
total time t  
one approach you can complete the square to find s 
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