Take logs of both sides:-
ln 625^x = ln 5
x * ln 0.625 = ln 5
x = ln 5 / ln 625
x = 0.25 answer
Area = Length x Width
63 = 9 x width
Width= 63 ÷ 9 = 7 feet
Answer: 7 feet
I think they are called sides.
Answer:
(3,-3.5)
Step-by-step explanation:

Midpoint M of the line segment is (3,-3.5)