If a winter jacket normally costs “p” dollars, but is on sale for 30% off, which of the following represents the sale price of the jacket?
1: 0.30p. 2: 0.70p. 3: 1.3p. 4: 1.7p

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.