# Thread: Function Notation - Revenue - know the answer, need to understand question

1. ## Function Notation - Revenue - know the answer, need to understand question

The relationship between the selling price of a sleeping bag, s dollars, and the revenue at that selling price, r(s) dollars, is represented by the function r(s)=-10s2 + 1500s.
Evaluate, interpret and compare r(29.95), r(60.00), r(75.00), r(90.00), and r(130.00). (13 marks)

a) r(29.95) = 35,954.97

They made a revenue of $35, 954.97. b) r(60.00) = 54,000 They made a revenue of$54, 000.

c) r(75.00) = 56, 250

They made a revenue of $56, 250. d) r(90.00) = 54, 000 They made a revenue of$54, 000.

e) r(130.00) = 26,000

4. ## Re: Function Notation - Revenue - know the answer, need to understand question

Yeah, I have my calculations included on the actual sheet I'll be handing in.
I'm always so cautious with math, it just looks too easy right now, I feel like there's a trick question I'm missing :/

5. ## Re: Function Notation - Revenue - know the answer, need to understand question

I have completed the square for all of the different values given. I just have them written on my sheet. I was just getting lazy to type in the calculations on here.
But.. That is it right? o-o I'm not missing anything they're trying to ask in between in the lines?