Othello buys a chariot for $200 a month at 4% compounded monthly for 3 years. What formula should you use to calculate the amount they earn?
a) SI = P(1 + rt)
b) CI = P(1 + r/m)ᵐt
c) FV = PMT((1 + r/m)ᵐt - 1)
d) All of the above