The amount of gasoline at a gas station changes from 85,319.61 gallons to 83,572.41 gallons over a day. What rational number represents the average change in the amount of gasoline per hour.

Nine more than four times a number is the same as one less than twice the number. find the number?

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

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