Need help. PLEASE HELP! I dont know how to do this

Issof claims that the scale factor is 1/2. which statement about his claim is correct

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

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?