How do you represent 1.98381100 in scientific notation?

Answer 1

As we look at 1.98381100 here, we see it has only one digit to the left of the decimal. That is the basis for scientific notation. That and representing the shifting of the decimal point to get a character string with that one digit to the left of the decimal. When we shift the decimal to write a number in scientific notation, we use a power of ten to designate the decimal shift needed to get that character string with the single digit to the left of the decimal. Here we don't need a decimal shift, so we don't need a power of ten. If we were going to write it with a power of ten, it would look like this: 1.98381100 x 100 In this expression, we see 100 in there, and we know any number to the zero power is one. As 100 equals one, why do we need to write it? The answer is that we don't. The number you wished to represent in scientific notation is already that way. The power of ten is only needed if there anything but one digit left of the decimal place in the number under consideration.