Final answer:
The greatest number among -6.6, -6.06, and -6.2 is -6.06 because it is the closest to zero, which means it has the smallest absolute value among the given negative numbers.
Step-by-step explanation:
The question asks which is the greatest number among −6.6, −6.06, and −6.2. To address this, we must understand the order of negative numbers on the number line. The number that is closest to zero is the greatest when dealing with negative numbers as they are to the left of zero on the number line. −6.06 is closest to zero because its absolute value, which is 6.06, is the smallest compared to the absolute values of −6.6 (which is 6.6) and −6.2 (which is 6.2). Therefore, the correct answer is: Option 2: -6.06 is the greatest number in the set.