Edgar has birdbath that holds 2 gallons of water. he only wants fill it 3/4 full how many 1 pint containers does it take to fill birdbath? explain

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?