Marquise has 200 meters of fencing to build a rectangular garden. The garden's area (in square meters) as a function of the garden's width x
(in meters) is modeled by:

A(x)=-x^2+100x

Which number is located at point a on the number line? a number line is shown from negative 10 to 10 with each interval mark on the number line representing one unit. point a is labeled one interval mark to the right of negative 5.