Some help on this please!

Two friends went to get ice cream sundaes. they each chose a flavor of ice cream from a list of vanilla and chocolate and toppings from a list of hot fudge, strawberries, sprinkles, peanuts, and whipped cream. use the sets below describing their choices and find b'. let a = {vanilla, chocolate, hot fudge, strawberries, sprinkles, peanuts, whipped cream} let b = {vanilla, hot fudge, sprinkles, whipped cream} let c = {chocolate, hot fudge, peanuts, whipped cream} {vanilla, hot fudge, sprinkles, whipped cream} {chocolate, strawberries, peanuts} {chocolate, strawberries} {vanilla, strawberries, peanuts}

You sign up for karate classes. the classes cost $ 8 0 $80 per month. write an equation for the number of dollars, d d, that you pay for your karate classes if you take classes for m m months. complete the table for the missing values of d d. m m d d 1 1 8 0 80 2 2 3 3 4 4 3 2 0 320

Which function has an inverse that is a function ?