What is the domain and range multiple choice question

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

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

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2