roberto earns $5 per hour plus 65% commision on all his sales. if y represents his sales for one day, which expression represents robertos total earnings for a day when he worked 6 hours?

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.