If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (c * d ) (x)?
a ) 4x3 + 18x2 – 10x
b ) x2 + 9x – 2
c ) 16x2 + 4x – 6
d ) 4x2 + 20x – 2

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.