Volunteers put together 40 school-supply kits in 8 minutes. At this rate, how many could they put together in 30 minutes? Solve this problem using a unit rate. (1 point) Responses 10.67 school-supply kits 10.67 school-supply kits 9,600 school-supply kits 9,600 school-supply kits 150 school-supply kits 150 school-supply kits 6 school-supply kits