In a 4 year period, about 80,000 acres of coastal wetlands in united states are lost each year. what integer represents the total change in coastal wetlands

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?

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.

Iknow the answer but the calculator doesn't seem to give the right one