The mean weight of a baby deer at a local zoo is 15.8 pounds with a standard deviation of 2.4 pounds. A researcher records the weight of the following five baby deer. 14.5 lbs, 16.8 lbs, 15 lbs, 16.4 lbs, and 15.9 Find s:

Ihonestly don’t understand this at all

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?

Plz ( true - false) all triangles have interior angles whose measure sum to 90.