Answer:
2.16 s
Step-by-step explanation:
When it hits the ground, height h=0 hence



Using quadratic formula

Since time can't be negative, 
t=2.16 s
Answer:i think it would most likely be c
Step-by-step explanation:
since you can only add denominators when they are the same number
Answer:
1/4 = 3/12 = 1/12+1/12+1/12
Step-by-step explanation:
Because 1/4 equals 3/12.