A pet store is selling a parrot for $300 and is providing a 20% discount. When they realize the parrot is not selling, they apply an additional 15% discount. What is the final cost of the parrot?

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.