The dependent variable, g, represents the gas mileage for a vehicle. Select all the variables that can represent an independent variable in this situation

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be able to prepare using the sauce?