A company that manufactures skateboards uses the function below to estimate f(x), its monthly revenue in dollars, based on x, the number of skateboards manufactured each month. f(x) = −0.01x² + 45x − 2,400

Which is the best choice for the domain of f(x) in this situation?

Acable company claims that the average household pays $78 a month for a basic cable plan, but it could differ by as much as $20. write an absolute value inequality to determine the range of basic cable plan costs with this cable company. a. |x − 78| ≥ 20 b. |x − 20| ≥ 78 c. |x − 20| ≤ 78 d. |x − 78| ≤ 20