The school currently has 30 classrooms. With the addition, there will be 40 classrooms. What percentage of the current number of classroom is the new number of classrooms? Round to the nearest percent.

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.