In a class of 35 students, 17 have taken mathematics,
% have taken mathematics but not
economics. If each student as taken at least one subject, find the number of students who have taken
economics but not mathematics​

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.