A batter hits a baseball upward with an initial speed of 96 feet per second. After how many seconds does the ball hit the ground? Use the formula h = rt − 16t2 where h represents height in feet and r represents the initial speed

Question

anonymous · Answer

To find how many seconds, the easiest way is to graph the function and calculate the zero on the right hand side with a graphing calculator.  When the ball hits the ground, the ground is the x axis

anonymous · Answer

solve 
$$96t-16t^2=0$$

anonymous · Answer

Or you could solve it with the quadratic formula

anonymous · Answer

$$-16x(x-6)=0$$
$$x=6$$