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.

At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%

Solve for x in the equation x2 - 12x + 36 = 90. x= 6+3x/10 x=6+2/7 x= 12+3/22 x = 12+3/10

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −