Which of the following options have the same value as 30%, percent of 81? Choose 3 answers: A 30/100⋅81 B 0.3⋅81 C .03⋅81 D 3/10⋅81 E 30⋅81

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.