Abuilding has a shadow that is 18 feet long. will is 5 feet tall, and he is standing next to the building. will has a shadow that is 3 feet long. how tall is the building

Francis is getting new carpet tiles in his living room and den. his living room and den are connected. he needs to figure out how much carpet he needs and the cost involved. if each tile costs $2.00 per sq ft, how much would it cost to have new tile put in the den? a) $24 b) $36 c) $48 d) $54 plz awnser soon