Part 3: Solve a real-world problem using a cube root function. Once Isabel rented the warehouse space, she decided to post ads on several social media sites to advertise her online bookstore. Let x represent the number of months the ads have been posted. Isabel finds that the function below describes the number of books sold as a function of the number of months her ads have been posted. f(x) = 1000 (√ ) + 1000 3 x a) How many books were sold after 8 months? (3 points) She would have sold 3000 books b) Graph the function. (10 points) (8, 3000)