Answer:
6.11 seconds
Step-by-step explanation:
Given

Required
When will it hit the ground?
When it hits the ground, f(t) = 0.
So, we have:

Solve quadratic equation using formula




Split
or 
or 
or 
Time can not be negative. So:

Answer:
So the set of all real square roots of -144 is the empty set. The imaginary square roots are i12 and -i12.
Step-by-step explanation:
hopefully that helps you
Answer:
I THINK IT'S C!!!
Step-by-step explanation:
EDGE 2020
Answer:
Either B or C, most likely B tho
Step-by-step explanation: