What is the difference between the 7th square number and the 2nd square number

Name the most appropriate metric unit for each measurement like the mass of cow

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.

What is the slope of the line shown below?