David can jog 3.5 miles in 75 minutes. What is David’s jogging rate per hour? (there are 60 minutes in an hour)

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

Y+ 2/y is it a polynomial in one variable or not? and if so, why?

Lucinda leaves money in her savings account for 8 years. she started with $800 and earned 3.5% interest compound annually. how much money is in her account?