Find the reciprocal to make each equation true

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?

Which is the focus of a parabola with equation y2=4x

Here is another math questions. i will keep asking different questions. 4^2x=6