Answer:

Step-by-step explanation:
Given

Required
Find x
We have:

Rewrite as:

Expand

Factorize

Factor out x + 520

Split

Solve

Side length must be positive;
So:

Answer:
52.5 ft squared
Step-by-step explanation:
You just multiply each side to get volume.
Answer:
B
Step-by-step explanation:
It's very easy
160,000/4 = n
n = 40,000
Answer: n = 40,000