Perimeter and area of a right triangle with 2a^3b, 4ab, and 6a^3b

Ineed with 14, 16, 28 and 36 me. we didn't go over them in class so i don't know what to do.

David must install fencing around a lot that is shaped like a right angle.the side of lot that runs east-west is 200 ft long.the side of the lot runs north-south is 125 ft long.calculate how many feet of fencing he will need to surround the entire lot.

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)