If a and b are dependent events, which of these conditions must be true?

Triangle xyz has vertices x(1,3), y(0,0)

The surface area of the triangular prism is .

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?