Amanufacturer of yoga pants sells them for $28 each. they hired some consultants who determined that the cost of manufacturing x pants was c\left(x\right)=x^2-2x-9 c ( x ) = x 2 − 2 x − 9 . a)write a function for the revenue (the amount of money the company brings in). b)write a function for the profit (the revenue – cost). c)find the number of t-shirts they should make to maximize the profit function. round your answer to the nearest whole number.

  a) r(x) = 28x

  b) p(x) = -x^2 +30x +9

  c) 15

Step-by-step explanation:

a) Let x represent the number of items sold. Each sale results in $28 of revenue, so the revenue function r(x) is ...

  r(x) = 28x

__

b) p(x) = r(x) - c(x) = 28x -(x^2 -2x -9)

  p(x) = -x^2 +30x +9

__

c) The axis of symmetry of ax^2 +bx +c is -b/(2a). Here, the axis of symmetry of the profit function is ...

  x = -30/(2(-1)) = 15

15 is the quantity of sales that maximizes profit.

the answer is d

step-by-step explanation:

go on the tube you might find some information there