10. susan wants to buy a paddle boat for $840. she will pay 20% down and pay the rest in six monthly installments. what will be the amount of each monthly payment?
a. $140
b. $28
c. $168
d. $112
11. a certain alloy contains 14.25% nickel. how much nickel is there in a piece weighing 375 pounds? round your answer to the nearest hundredth.
a. 112.49 pounds
b. 12.24 pounds
c. 53.44 pounds
d. 78.92 pounds