Final answer:
The correct linear equation representing the hours Mr. Klett has left of community service after x days is h(x) = 40 - 6x.
Step-by-step explanation:
The question revolves around writing a linear equation to represent the hours Mr. Klett has left to complete after x days of doing community service. Mr. Klett is committing to 6 hours of community service per day starting with a total of 40 hours. The equation we are looking for will start with 40 hours and subtract 6 hours for each day he works. Therefore, the correct linear equation is h(x) = 40 - 6x.