Acompany that makes rubber ducks has a start up cost of $ 7. it costs the company $ 2.91 to make each rubber duck. the company charges $ 3.74 for each rubber duck. let denote the number of rubber ducks produced. determine the cost function for this company. the cost function is the amount it costs to manufacture the rubber ducks. c(x)=

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3

Reinel saves 30% of every pay check. his paycheck last week was 560$. how much did reniel save last week?