Let set c = {even numbers between 1 and 99} and set d = {numbers between 1 and 150 that are evenly divisible by 10}.
what is c ∩ d?
a: {10, 20, 30, 40, 50, 60, 70, 80, 90}
b: {10, 20, 30, 40, 50, 60, 70, 80, 90, 100}
c: {all even numbers between 1 and 99}
d: {numbers between 1 and 150 that are evenly divisible by 10}

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