Let x
represent the number of SM media players (‘SMs’) produced and sold in a

typical week. Suppose the cost, in MYR, to produce
x
SMs is given by C(x) = 10x + 2000, for x >= 0, and the price, in MYR per SM, is given by r(x) = 450 - 15x for 0 <= x <= 30
a) Determine

r-1(x)
and state its domain.
b) Determine and interpret
r-1(105).
c) The profit (in MYR) made from producing and selling
x
SMs per week is R(x) = -15x² + 350x - 2000 , for 0<=x<=30. Examine ( R•r-1)(x)

and determine what price per SM would yield the maximum profit.