SOLUTION: A rock is thrown upward with a velocity of 15
meters per second from the top of a 34
meter high cliff, and it misses the cliff on the way back down. When will the rock be
Question 1145087: A rock is thrown upward with a velocity of 15
meters per second from the top of a 34
meter high cliff, and it misses the cliff on the way back down. When will the rock be 4
meters from the water, below? Answer by ikleyn(52776) (Show Source): You can put this solution on YOUR website! .
To answer the question, solve the quadratic equation
-5t^2 + 15t + 34 = 4.
Simplify
t^2 - 3t - 6 = 0
and solve it using the quadratic formula.
Choose a positive root.