Final answer:
To the nearest hour, Clark worked approximately 18 hours.
Step-by-step explanation:
To find out how many hours Clark worked, we can subtract the amount he spent on the bus pass from the amount he had left. This will give us the amount he earned in one week. Subtracting $16 from $182 gives $166.
Since he earns $9 per hour, we can divide the amount he earned by $9 to find out how many hours he worked. $166 ÷ $9 ≈ 18.44. Rounding to the nearest hour, Clark worked approximately 18 hours.