Final answer:
To earn a total of $400 for 1 week of work, you need to work approximately 12.5 hours as a landscaper.
Step-by-step explanation:
To earn a total of $400 for 1 week of work, you need to calculate how much you will earn at the gas station and then determine how many hours you need to work as a landscaper to make up the remaining amount.
First, calculate how much you will earn at the gas station: $8.75/hour x 30 hours/week = $262.50.
Next, subtract the amount earned at the gas station from the desired total: $400 - $262.50 = $137.50.
Now, divide the remaining amount by the hourly wage as a landscaper to find the number of hours needed: $137.50 / $11/hour = 12.5 hours.
So, you would need to work approximately 12.5 hours as a landscaper to earn a total of $400 for 1 week of work.