To find Nick's hourly earnings for the job, we need to divide the total amount he earned by the number of hours he worked.
Based on the question, we know that Nick spent 4.2 hours working on Deborah's lawn.
Since the question doesn't provide the total amount Nick earned, we'll have to calculate it based on the prices listed in the chart.
According to the question, Nick was hired to remove leaves, aerate the lawn, and plant 3 flower beds. However, the prices for these services are not provided in the question.
Therefore, we can't determine the correct answer without additional information.