I CANT DO ANYTHING!!! help me….

Explain what a reasonable domain and range would be for each situation:

1. The number of 8-slice pizza’s needed to feed x people at a party where each person will eat 3 slices

2. The time it takes to bicycle M miles at a rate of 15 miles per hr

Write a function to represent each situation:

3. Each large tub of ice cream makes 80 single-dip cones. A single-dip cone sells for $1.49

and then #4 is just some problem…..

PC Haven sells computers at a 15% discount on the original price plus a $200 rebate. Write a function to represent the final price of a computer at PC Haven. What is the value of the function for an input of 2500, and what does it represent????