What is the standard deviation of the data set? Round to the nearest tenth if needed. 2, 4, 7, 8, 9 2.6

7

6

2.9

2(n-1)+4n=2(3n-1)n=0no solutioninfinitely many solutions n= - 4 !

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?