Consider the equation below. (If an answer does not exist, enter DNE.) f(x) = 9 cos2(x) − 18 sin(x), 0 ≤ x ≤ 2

Find the local minimum and maximum values of f
Find the inflection points. (Order your answers from smallest to largest x, then from smallest to largest y.)

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?