Which number is ordered from least to greatest? 2/5 -2/5 5/6 -5/6

What is the y intercept of f(x)=(1/2)^x?

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

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?