Frank is a manager of a doctor’s office. The office uses 20 sheets of paper three times a day for printing. How many sheets of paper will the office use in 21 days? (Show your work)

Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000