Answer:
After 3 seconds
Step-by-step explanation:
Given

Required
Time the drop will hit the ground
When the drop hits the ground,

So, we have:

Rewrite as:

Expand

Factorize

Factor out 5t + 1

Split
or 
Solve for t
or 
Time cannot be negative.
So:

Answer:
1)84 yd
2)63 in
3)7853.98 mm (round as you want)
4)153.94 ft
5)201.06 m
Step-by-step explanation:
Answer: x=18
Step-by-step explanation:
X/3=6
We want to get x alone so we multiply both sides by 3
X=18
Answer:
62390
Step-by-step explanation:
you have to round up if it's 5 or more and round down if it's less.