Question 189307
For problems 11 through 13, a projectile is fired upward with an initial speed of 800 feet per second. It is given that  (h is the height of the ball). 

What will you set h equal to in the equation to find how many seconds it takes for the projectile to hit the ground? 
a. h = 0
b. h = 1
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h is the height.  The ground is h=0, so set it to zero.