. (Compound value solving for r) At what annual rate would the following have to be invested? a. $500 to grow to $1,948.00 in 12 years
b. $300 to grow to $422.10 in 7 years
c. $50 to grow to $280.20 in 20 years
d. $200 to grow to $497.60 in 5 years

Assume that a local bank sells two services, checking accounts and atm card services. the bank’s only two customers are mr. donethat and ms. beenthere. mr. donethat is willing to pay $8 a month for the bank to service his checking account and $2 a month for unlimited use of his atm card. ms. beenthere is willing to pay only $5 for a checking account, but is willing to pay $9 for unlimited use of her atm card. assume that the bank can provide each of these services at zero marginal cost.refer to scenario 17-5. if the bank is unable to use tying, what is the profit-maximizing price to charge for a checking account