Using the profit concept, it is found that the number of days that will take for the company to earn a profit is given by:
In this problem:
Hence, the profit function is:
[tex]p(x) = R(x) - c(x)[/tex]
[tex]p(x) = -x^2 + 5x + 22 - (2x^2 - 20x + 70)[/tex]
[tex]p(x) = -3x^2 + 25x - 48[/tex]
Using a graphing calculator, it is found that the profit is positive after 3 days, hence, option iii is correct.
You can learn more about the profit concept at https://brainly.com/question/4001746