If a line segment AB is on the number line, and the point A is at - 4 and point B is at 7, the length of AB is . Select one: a. - 3 b. 11 c. 3 d. 10

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