PRECAL QUESTION - please help thanks

The legs of a right triangle measure 6 meters and 8 meters. what is the length of the hypotonuse.

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

15 liters is approximately how many gallons