Answer:
4500 feet
Explanation:
Unit Conversion used:
1 yard = 3 feet
Unit multipliers used:


The unit multipliers are set up in such a way that when they are multiplied with eachother, the initial unit of “weeks” gets cancelled out and the final answer is assigned the units of “feet”
∴Total distance he swam during =
×
×
×

his winter break = 4500 feet