MATH SOLVE

3 months ago

Q:
# Keisha throws a rock down an old well the distance D in Feet The Rock Falls after T seconds can be represented by D =16t ^ 2 + 64t if the water in the well is 80 ft below ground how many seconds will it take for the rock to hit the water?β

Accepted Solution

A:

Answer:1 second Step-by-step explanation:16t^2+64t=8016t^2+64t-80=064^2-4(16)(-80)9216-64-96______ = -5 32-64+96_______ = 1 sec 32