1. A young lady invested $50 to plant Christmas trees on her grandfather's farm. When the lady was a first year student in college, six years later, she harvested the trees and sold them for $490. What annual rate of return (i.e. interest rate) did she earn on the investment, assuming she incurred no expenses in the interval?

2. Find the future value in 2 years of $99 that is deposited in an account which pays 12% annual rate with monthly compounding.

3. A 30 year mortgage bears annual interest at 12% and has a principal of $145,852. What will the monthly payments equal assuming monthly compounding?