Answer:
2257.50
Explanation:
B=p(1+r)^t
p= principal amount= $7000 in the saving account
r= interest rate= 15%= .15
t- number of years = 2
B= 7000(1+.15)^2
B= 7000(1.15)^2
B= 7000(1.15)(1.15)
B= 9257.50
She has a total of 927.50 dollars in the account after two years. To find out how much of that is interest we take the Balance and subtract what she invested.
B-p= 9257.50-7000= 2257.50 earned in interest.