Answer:
C.) 
Step-by-step explanation:
The area formula:

Insert the values:

Use the distributive property:

:Done
7.25 hour is better because multiply by eleven and its 79.75 which is higher than the on on the table
A^2 - b^2 = (a-b)(a+b)
To test it, expand the right hand side.
Given:
Rate of simple interest = 5%
Time = 4 years
Total interest = $160
To find:
The amount borrowed by Austin from a credit union.
Solution:
The formula for simple interest is:

Where, P is principal, r is the rate of interest and t is the number of years.
Putting
in the above formula, we get



Multiply both sides by 5.

Therefore, Austin borrowed $800 from a credit union for 4 years.