Answer:
7/2??
Step-by-step explanation:
Im not sure what you mean but 3 1/2 is the same thing as 7/2
Divide -3
-3/-3a = 15/-3
a = -5
When stone hits the ground, it's height will be zero, and since we're finding the time that's required for the stone to hit the ground, we can set h = 0 and solve for t.