Final answer:
The correct inequality to represent George's goal of saving at least $500 by mowing lawns, starting with $75 and earning $20 per lawn, is 75 + 20l ≥ 500, where 'l' is the number of lawns. The provided options are incorrect.
Step-by-step explanation:
The inequality that represents George's summer savings goal is 75 + 20l ≥ 500, where 'l' represents the number of lawns that George mows. George starts with $75 and earns $20 for each lawn he mows, and he wants his savings to be at least $500. The correct option would be none of the provided ones, since there seems to be a misunderstanding in the options given. The correct inequality should relate the number of lawns mowed to the additional income needed to reach or surpass the goal.