math
posted by Bryce .
`A chain store manager has been told by the main office that daily profit, P, is related to the number of clerks working that day, x according to the equation P= 25x^2+300x. What number of clerks will maximize the profit, and what is the maximum possible profit?

The max. point is the vertex:
Xv = B/2A = 300 / 50 = 6 Clerks.
P = Yv = 25*6^2 + 300*6 = $900 = Max.
profit.