Mitch has saved $20000 to finance his boating hobby. A new boat costs $1500 per foot in length. If Mitch needs to keep $500 for a license and registration, and three times that amount for docking fees, how many feet is the longest boat he can buy?
Let’s work this out in a step by step way to be sure we have the right answer.
12
Mitch needs to keep 500 * 3 = 1500 for docking fees.

Thus, he needs to keep 500 + 3 * 500 = $2000 for license, registration, and docking fees.

He has 20000 - 2000 = $18000 left to spend on a boat.

Therefore, the longest boat he can buy is 18000 / 1500 = 12 feet long.

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The answer: 12