Can someone show me how to even start with 1 and 2?

What is the frequency of the sinusoidal graph?

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

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost