Help me. The diameter of a circle has endpoints S(2, 7) and U(4, -3). What are the coordinates of the center of the circle?

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.