You invest $2,000.00 at a rate of 4% apr for a 3 months. how much interest did you earn?
a. $80.00
b. $40.00
c. $20.00
d. $10.00
you earn $10.00/hour and work 40 hours/week. you invest $4,000.00 at an interest rate of 5% apr for a year. how much interest did that savings earn in a year in terms of hours of work?
a. 100 hours
b. 20 hours
c. 40 hours
d. 400 hours