What is the measure of the missing angel?

Which of the following shows the length of the third side, in inches, of the triangle below

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30

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?