Ateacher gave her class two exams; 60% of the class passed the second exam, but only 48% of the class passed both exams. what percent of those who passed the second exam also passed the first exam?

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?