b. What does mean and what is its value?

The expression denotes the absolute value of 1.8, which is simply the distance of the number from zero on the number line. Since 1.8 is already a positive number, its absolute value is the same as itself, so .

In everyday life, the concept of absolute value can be applied in various scenarios, such as calculating distances. For instance, if you’re figuring out how far east or west you’ve traveled on a road, the absolute value helps you understand the total distance without worrying about the direction. So whether you went 5 miles east or west, the distance traveled is 5 miles!