Since figuring out your pay would require us to multiply each year by a constant number, this is classified as a geometric sequence. The formula for the general term for any geometric sequence is an = a1 (r)n-1, which we can use to calculate your 20th salary. Take note that many of the variables in this equation were also used in the arithmetic sequence. Therefore, we should have no trouble determining that n=20, the number of years we are looking for, and a1=30,000, your starting value. This leaves us with an unfamiliar variable, r. R stands for the common ratio. That means the constant number it is being multiplied by, 1.04. After substituting these values into the formula and solving, you should find that you would make $63,205.48 during year 20 at Dr.Canal's