Numbers

Because decimal numbers that can't be expressed as fractions are irrational numbers whereas all rational numbers can be expressed as decimals or fractions.

Yes.

1.4 = one and four tenths.

It is 127 in decimal numbers.

You need to rewrite so we can understand

20137 is an integer and the integers are a subset of rational numbers!

No. Real numbers are divided into two DISJOINT (non-overlapping) sets: rational numbers and irrational numbers. A rational number cannot be irrational, and an irrational number cannot be rational.

Yes and it is 10 which is their greatest common factor

It is: 300,000,000

Yes, because it can be located on a number line.

If you were writing this amount on a personal check, on the line below the payee you would write:
Three-Thousand, Seventy-Eight Dollars and 00 cents.

To express this number in word form it would be: Three-thousand, Seventy-Eight

Let the numbers be x+4.27 and x:-

If: (x+4.27*x = 39.465

Then: x^2 +4.27x -39.465 = 0

Using the quadratic equation formula gives x a positive value of 4.5

Therefore the numbers are: 8.77 and 4.5

Check: 8.77*4.5 = 39.465

In relation to what? In a general sense they are the rules that govern their usage in mathematics and also define their properties. Huurrrmmppfff. I think.

Yes.

Placing a question mark at the end of a phrase does not make it a sensible question. Try to use a whole sentence to describe what it is that you want answered.

Counting is finding out how many discrete objects are in a given collection by usually naming each of the natural numbers one after the other going up.

It would be 20,000 rounded to the nearest hundred and not 19,900

250,000

140,000,000

One terabecquerels, or 1000000000000 becquerel - depending on what you mean by "long hand".

Fifty-six hundredths

A whole number

(because a dollar is made up of 100 cents).

1, 325 cents 100 = 13.25 100

1,325 cents​=13.25

Thus, in decimal notation, 1,325 cents equal $13.25

7 is a whole number.

It is 1 + 0.08 + 0.001