<span>Rewriting, you can see that in this problem, EV is just the average of the five bill values </span> <span>EV = (1/5) * ($1 + $5 + $10 + $20 + $100) </span>
-6 x 2 + 6 x 200. Since you want to find out 6 multiplied by 198 the easiest way (for me) would be to round it and then substract 12 since 200-198 is equal to 2 and 6 x 2 is equal to 12
When you have an exponent that is a fraction, the denominator is the number you root the base by. In this case the exponent is 3/5, so you fifth root 13 cubed.