Suppose you have $75 to spend on gas for your whole trip. you know that gas costs $3.40 per gallon. how many gallons of gas can you buy with $75? write an equation to solve the problem. round your answer to the nearest tenth of a gallon.

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax