Jacinda shovels driveways to earn money. She can shovel 12 driveways in 5 hours. She earns $22.00 for each driveway. Jacinda is saving up to buy a new computer that costs $950.40. How many hours does Jacinta need to work to earn enough money to purchase the computer?

Abank manager wants to encourage new customers to open accounts with principals of at least $2,500. 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! "?