What is number between 6.73 and 6.741 and ex plane it?

Answer 1

Decimals are infinite, therefore there is an infinite selection of numbers between the two you cited. For practical reasons we limit the numbers we use to those that will have a discernible effect.

For example you might need 10 apples to make a pie. There would be little difference between 9 and a half apples and 10 and a half apples in a pie so we use a whole number like 10.

On the other hand, the human body can be stirred to emergency action with one billionth (1 divided by 1,000,000,000) of an ounce of epinephrine (Adrenalin commercially). That tiny amount is what gets us ready to fight for our lives or flee from danger; it makes us shake with emergency energy, it allows the muscles to convert blood sugar into powers and abilities far beyond what we are normally capable of.

When a mother lifts a car to save her baby in an accident, that is when .000000001 becomes an important decimal.

Answer 2

6.31

Answer 3

6.473