Haruka owns an umbrella factory. The revenue, RRR, she makes from selling nnn umbrellas is given by the function R(n)=18nR(n)=18nR, left parenthesis, n, right parenthesis, equals, 18, n, and the profit, PPP, that she makes from selling nnn umbrellas is given by the function P(n)=17n-5P(n)=17n−5P, left parenthesis, n, right parenthesis, equals, 17, n, minus, 5.