Help I’m confused

In trapezoid bath, ah=19.7 and et=16.1. identify be.

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Kevin is an insurance salesman. when he sells a policy, he makes 20 percent of the policy premium (p) up front; then each year the policy is active, he receives 15 percent of the original premium. which equation could be used to figure his total commission on a policy that has been active for five years? c=0.80p c=0.20p + 0.15p c=0.35p + 4(0.15) c=0.95p