1. Gordon Rosel went to his bank to find out how long it will take for $1,500 to amount to $1,720 at 5% simple interest. Calculate the number of years. (Round time in years to the nearest tenth.)

2. Lucky Champ owes $168.30 interest on a 6% loan he took out on his March 17 birthday to upgrade an oven in his Irish restaurant, Luckys Pub and Grub. The loan is due on August 17. What is the principal? (Use 360 days a year. Do not round intermediate calculations.)