Final answer:
To represent the height requirement for the Great Bear roller coaster, an inequality should be used, demonstrating that a person's height must be at least 90 inches tall, which is written as >= 90 inches.
Step-by-step explanation:
To represent the situation of being at least 90 inches tall to ride the Great Bear roller coaster at Hershey Park, you would use an inequality. An inequality is appropriate here because it allows for a range of heights that are 90 inches or taller. It's not just one fixed value but any value that meets the condition of being equal to or greater than 90 inches. The inequality to represent this situation would be written as >= 90, where the height of a person must be greater than or equal to 90 inches to ride.