It can shorten the expression into a number that can more easily be understood by giving an order of magnitude to the number. For example, would you write 0.00000000000000000045 or would you write 4.5 X10-19.
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Scientific notation (also called standard form or exponential notation) is a way of writing numbers that accommodates values too large or small to be conveniently written in standard decimal notation
The number with 32 zeros is 10^32, which is equivalent to 1 followed by 32 zeros. In scientific notation, this number is represented as 1 x 10^32. This number is also known as a googol, which is larger than the total number of atoms in the observable universe.
This is one of the reasons why scientific notation is useful. The major problem here is how many zeros we are working with. 100,000 times 200,000 = 1*10^5 * 2*10^5 = 1*2 *(10^5) *(10^5)= 2 * (10^10)= 20,000,000,000 that's a 2 with 10 zeros!
The number you've provided is a one followed by 100 zeroes, or 10^100 in scientific notation. This number is known as a googol, a term coined by mathematician Edward Kasner in the early 20th century. A googol is vastly larger than the estimated number of atoms in the observable universe, making it a useful concept for illustrating the vastness of large numbers.
3.3 is a rational number. It's the ratio of 33 to 100. Here's a useful factoid: Any number that you can write down completely is a rational number.