Plz
suppose the linear cost function c(x) = 6x gives the cost for buying x items. if the items are sold in packages of 10, and no one can buy more than 5 packages, then the range of the function c is
a) [0, 50]
b) [5, 10]
c) {0, 6, 12, 18, 24, 30}
d) {0, 60, 120, 180, 240, 300}