Your friend tells you that if you let her keep 202020 of your Pokemon cards for three months, she will give you 222 cards extra when she returns your cards to you. What is the annual rate of interest she is willing to pay for the borrowed cards?
Note: Even though she only keeps your cards for three months, we can still calculate an annual interest rate.

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