A swim school is expanding and needs to take out a one-year, $55,000 loan for a new lap pool. Bank A says it can give the swim school a 25% annual interest rate compounded once. This is represented with the equation A=55,000(1.25)t. A = 55,000 ( 1.25 ) t . Bank B says it can offer the swim school a semi-annual interest rate that will be compounded twice. In order for the loan at Bank B to cost the swim school the same amount, what APR would Bank B need to offer?

Therefore the bank need to offer 23.6% annual interest rate compounded twice.

Step-by-step explanation:

Compound interest formula:

A=Amount

P=Principal

r=rate of interest

n= Number of times interest is compounded per year.

t= time

Bank A

P=$55,000, r=25% = 0.25, n=1, t=t

The amount that the school have to pay after t year is

Bank B

P=$55,000, r=?, n=2, t=t

The amount that the school have to pay after t year is

Since the amount for both banks are same.

i.e

⇒r=0.118×2

⇒r = 0.236

⇒r =23.6%

Therefore the bank need to offer 23.6% annual interest rate compounded twice.

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