Answer pls

How do you multiply a mixed fraction by a regular fraction

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.

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g