4. Marcy deposits $320 in an account that earns 3.5% simple interest per year. What is the balance in the account after 4 years?
A. $448.00
B. $331.00
C. $364.80
D. $768.00

c. $364.80

explanation: find the interest, then add the interest to the principal

to find interest:

interest = principal x rate x time

>> interest = 320 x 0.035 x 4

after multiplying, you get 44.80, which is the simple interest

to find account balance:

account balance = principal + interest

>> 320 + 44.80 = 364.80

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction