Domain range and function

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.

Rewrite so the subject can be y in the formula d=m-y/y+n

Find the percent error of the measurement 4 cm