A convex hexagon has exterior angles of 54°, 38°, 41°, 64°, and 66°. What is the measure of an exterior angle at the sixth vertex?

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?