A ing a fundraiser for a trip to Washington D. C. The students plan
sell pencils with the school logo for $1.50 each. They compare three online
companies that sell personalized pencils in bulk. Which company should they
choose? How much profit will they make on each pencil?
Company A 100 pencils for $44
Company B 150 pencils for $60
Company C 200 pencils for $76

I'm so close to finishing all these.

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?

An equation where variables are used to represent known values—function notation true or false