A small company shows the profits from their business with the function P(x)= -0.01x^2+60x-500, where x is the number of units they sell and P is the profit in dollars. a. How many units are sold by the company to earn the maximum profit? b. Between which numbers of units sold does the company show a profit?

Frank is lending $1,000 to sarah for two years. frank and sarah agree that frank should earn a real return of 4 percent per year. instructions: a. the cpi (times 100) is 100 at the time that frank makes the loan. it is expected to be 113 in one year and 127.7 in two years. what nominal rate of interest should frank charge sarah?