What is three and one half divided by fiftyone and one thirds in simplest form

What is the equation of the graph below? y=sec(x)-4

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.

Its worth 10000000 points need asap if you answer correctly ill mark brainliest