Final answer:
When the number 65.59 is rounded to contain 2 significant figures, it becomes 66.
Step-by-step explanation:
When the number 65.59 is rounded to contain 2 significant figures, it becomes 66.
To round a number to a certain number of significant figures, we start counting from the leftmost non-zero digit until we reach the desired number of significant figures. If the digit to the right of the desired significant figures is greater than or equal to 5, we round up. Otherwise, we round down.