A juggler is performing her act using several balls. She throws the balls up at an initial height of 4 feet, with a speed of 15 feet per second. If the juggler doesn't catch one of the balls, about how long does it take the ball to hit the floor?
Hint: Use H(t) = −16t2 + vt + s.
7.52 seconds
1.15 seconds
0.47 second
0.22 second

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\[H(t)=-16t^2+15t+4\] set
\[-16t^2+15t+4=0\] and solve for \(t\)

on account of when it hits the floor, the height is zero

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