John can paint a fence in 6 hours. Jason can paint the same fence in 12 hours. How many hours would it take for them to paint the same fence if they worked together.
Give the exact value

Pamela has a 30-year, 5.75% mortgage on her $250,000 home. she has been paying on it for 5 years, and has recently hit some financial trouble. if her lender agreed to lower the interest rate on her $231,905.47 balance to 5.5%, what will her new payment be for the remainder of the loan?