It is the distance from the origin to the number in question.
18/10
5/10
Numbers are either irrational (like the square root of 2 or pi) or rational (can be stated as a fraction using whole numbers). Irrational numbers are never rational.
2/10
The answer to your question begins with a question to you. How do you know what number you are interested in ? How is it specified ? If the number is written down as a decimal, it must have a finite number of digits. This would make it a rational number. If it is written down as a fraction, that also is rational. If the number is specified as a procedure, that may or may not be rational. You make the determination using your head for logical thought - something calculators can't do. So, the short answer to your question is : no, except for a few very special cases, most of which are susceptible to logical analysis anyway.
Rational
Z=Integers; Rational numbers={a/b| a,b∈Z, b ≠ 0}.
If you can completely write a number, using digits, fractions and decimals, then the number is rational. You appear to have done that.
If you can completely write a number, using digits, fractions and decimals, then the number is rational. You appear to have accomplished that.
If you can write down the number completely, using digits, decimals, and fractions, then it's rational.
Yes. It's the ratio of (30,303) to (250,000). Any number that you can write completely using digits and a decimal point is a rational number.
Yes. Any number that you can completely write down using digits and a decimal point is a rational number.
If you can completely write a number, using digits, fractions and decimals, then the number is rational. You appear to have accomplished that.
If you can completely write a number, using digits, fractions and decimals, then the number is rational. You appear to have accomplished that.
Not necessarily. The value of 3 (rational) raised to the power 1/2 (rational) is not rational.
If you can completely write a number, using digits, fractions and decimals, then the number is rational. You appear to have accomplished that.
rational number integer irrational number natural number Technically, you won't be using a number; you'll be using a measurement. As for what type of measurement, I know with absolute certainty that you'll be using meters, because the context of the question establishes this.