Question 15
Concrete has mass density 144 lb/ft³. Each rectangular paving slab is 3 ft × 2 ft × 2 in. How many COMPLETE slabs can be made from one ton? AI reconstruction: “ton” means a long ton of 2240 lb; use all material possible, with no waste. Original interval choices were A:9–11; B:11–13; C:13–15; D:15–17; E:17–19. Because intervals share endpoints, enter the whole-number count directly.
