Answer:
he will have $832.20 in his account if it is adding the rate if it is subtracting the rate then it is $627.80
Explanation:
you first need to find out what is 2.8% of $730. this number ends up being $20.44 and you multiply it by 5 because the account exists for 5 years. then depending on if it is adding or subtracting to the account. if it is adding then it will be $832.20, and if it is subtracting it will be $627.80
P.S. This is all done by a kid in middle school.