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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 solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?