Choosing between two printing plans

A print shop offers two price plans for printing \(n\) pages.

• Plan A: a fixed charge of \(\$12\) plus \(15\) cents per page.
• Plan B: \(24\) cents per page, with no fixed charge.

1. Write down, in dollars, the cost of printing \(n\) pages under each plan.[2]
2. Form and solve an inequality to find the least number of pages for which Plan A is cheaper than Plan B.[3]
3. A teacher needs \(30\) copies of a \(4\)-page worksheet. Which plan should she choose, and how much does she save? Check that your answer agrees with part (b).[2]