Faith invests money in an account paying a simple interest of 4% per year. If no money will be added or removed from the investment, what should she multiply her current balance by to find her total balance in a year in one step?

Jessica is organizing a guided tour of the rain forest. the average profit per person that the touring company makes is given by the rational expression 18x+35/x, where x is the number of people going on the tour. what does the numerator of this rational expression represents?