Otto has some whipping cream that is 30\%30%30, percent butterfat and some milk that is 2% percent butterfat. He wants to make a 500mL. mixture of them that is12% percent butterfat. What does point K represent in this context

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?