Question 254988
The inventor of a new product charges $4 per unit.
Her profit for producing and selling x units given by the function: 
P(x)= 2.25x-7000
A) When x = 2000, Profit P(2000) = (2.25)*2000-7000
                                 = 4500-7000
                                 = -2500
  So there is a loss of 2500$
B)When x = 5000, Profit P(2000) = (2.25)*5000-7000
                                = 11250-7000
                                = 4250
  So there is a profit of 4250$
C.  What is the break even point for sales
To get the break even point we have P(x) = 0
                             2.25x-7000=0
                             2.25x = 7000
                                 x = 7000/225
                                 x = 31 nearly