Hi can you give me a solving problem with this one?

@succed (879)
United States
November 20, 2006 3:07am CST
George puts $5,400 in a savings account at an annual interest rate of 6.5%. Approximately how much interest will the principal earn in 2 years?
1 response
TDonald
@TDonald (1421)
• United States
20 Nov 06
Compounded how often?
succed
@succed (879)
• United States
20 Nov 06
The answer to this is is $725.00 but I would like to know how did they come up with it?
succed
@succed (879)
• United States
20 Nov 06
Can you come up with the formula?