Final answer:
The question lacks specific details from Exercise 3, but generally, to find out how many hours per week Lamar needs to work, one would divide the total amount needed by the number of weeks and then divide by his hourly wage, rounding to the nearest hour.
Step-by-step explanation:
The question seems to be missing specific information from Exercise 3 to determine how many hours Lamar needs to work during a 40-week school year to make a certain amount of money. However, typically with these types of problems, you would divide the total amount Lamar needs to make by 40 to find how much money he needs to make per week. Then, you would divide that weekly amount by his hourly wage to find out how many hours he needs to work each week. Remember to round your final answer to the nearest hour as the question instructs.