Aperson on a moving sidewalk travels 21 feet in 7 seconds .the moving sidewalk has a length of 180 feet. how long will it take to move from one end of the sidewalk to the other

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?