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How many named large numbers are there?
An infinite number. If I count to one trillion, I can always count to one trillion one.
Is it easy to match the distances when they are in scientific notation?
Yes they are, if they are large numbers. You do not need to count how many digits there are.
Why are the very large and very small numbers usually written in powers of ten?
That gives a better overview. It's easier to compare two large numbers (or small numbers) written in scientific notation than if they are written out. When the numbers are written out, you have to count digits, which can be slow, error-prone, and basically useless. When the number is in scientific notation, the counting has basically already been done for you. To compare two numbers in normalized scientific notation, just compare the exponents.
Why you use commas when writing large numbers?
In representing large numbers, English texts use commas (or spaces) to separate each group of three digits. This is almost always done for numbers of six or more digits, and optionally for five (or even four) digits. This makes it easier to read the number without having to count how many place holders there are in the number as a whole.
Why is scientific notation helpful to those who study planets?
Because of the very large (and sometimes very small) numbers involved.Because of the very large (and sometimes very small) numbers involved.Because of the very large (and sometimes very small) numbers involved.Because of the very large (and sometimes very small) numbers involved.
