James made a deposit in a savings account 5 years ago. the account pays 4% simple annual interest. since then, he has earned $120 in interest. what is the current balance in his account?

a. $200
b. $600
c. $720
d. $780

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?