$5200 at 7.36% for 54 months

use either

5200*0.0735/12 * 54
or
4200((1+0.0735/12)^54 - 1)

or something else, depending on just what it is you want to know...
I don't mind helping with answers, but don't make me come up with the question too!

agw

To calculate the total amount of interest earned on a principal amount of $5200 at an interest rate of 7.36% over a period of 54 months, you can use the formula for compound interest:

A = P*(1 + r/n)^(n*t)

Where:
A = the final amount including the interest
P = the principal amount
r = the annual interest rate (in decimal form)
n = the number of times interest is compounded in a year
t = the time in years

In this case, the principal amount (P) is $5200, the annual interest rate (r) is 7.36%, and the time (t) is 54 months.

First, you need to convert the annual interest rate to a decimal by dividing it by 100:
7.36% / 100 = 0.0736

Since the interest is compounded monthly, the number of times interest is compounded in a year (n) is 12.

Next, convert the time from months to years by dividing it by 12:
54 months / 12 = 4.5 years

Now we have all the values needed to calculate the final amount (A):

A = 5200 * (1 + 0.0736/12)^(12*4.5)

Using a calculator, solve the equation to find the final amount:
A ≈ $6,680.77

Therefore, the total amount including the principal and interest at the end of 54 months would be approximately $6,680.77. The interest earned on this investment would be $6,680.77 - $5200 = $1480.77.