You want to make some apple pies. Apples cost $1.40 per pound. How much does it cost to buy 16.2 pounds of apples

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.