Two pumps were required to pump water out of a submerged area after a hurricane. pump a , the larger if the two pumps, can pump the water out in 25hours, whereas it would take pump b 125 hours. both pumps were working for the first 5 hours until pump a broke down. how long did it take pump b to pump out the remaining water ?

Abank manager wants to encourage new customers to open accounts with principals of at least $2 comma 500. he decides to make a poster advertising a simple interest rate of 3%. what must the principal be if the bank manager also wants to advertise that one can earn $10 the first month? can the poster correctly say, "open an account of $2 comma 500 and earn at least $10 interest in 1 month! "?