math
posted by joe .
Billy Jeans' profit is given by the equation y=2.7.0000015(x2550)^2, where x represents the number of units manufactured and y represents the profit given in millions of dollars. What is the maximum possible profit?
a) 2.55 billion dollars
b) 7.1 million dollars
c) 9.8 million dollars
d) 2.7 million dollars
Calculate dy/dx and set it equal to zero.
dy/dx = 1.5*10^2*(x2550)=0
x = 2550 at the maximum
Y (@ x=2550) = 2.7 million
The answer is (d)

I was hoping to using this as my a example could you show me how to get to the answer. I'm horrible at math.