help! thnx
2007-04-07 13:18:39 · 6 answers · asked by bae 1 in Science & Mathematics ➔ Mathematics
Rational. A rational number is a number that can be written as a fraction of whole numbers. 13.1 can be written as 131/10. Both 131 and 10 are whole numbers, so 13.1 is rational.
A second definition of rational numbers is that they have a decimal which terminates or repeats. In this case, 13.1 has a terminating decimal, because there are no other numbers after the ".1". So that's another way to show that 13.1 is rational.
Don't confuse "rational number" with the term "real number", which another answerer did here.
2007-04-07 13:21:10 · answer #1 · answered by Anonymous · 1⤊ 1⤋
It's rational: 13.1 = 13 1/10 = 131/10, a fraction!
2007-04-07 20:29:06 · answer #2 · answered by steiner1745 7 · 0⤊ 0⤋
13.1 is a rational number because it can be placed in the form of a fraction and iin this case it is 13 1/10
2007-04-07 21:19:54 · answer #3 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
13.1 is the same as
13 and 1/10 which is the same as
131/10
and that has the form: a/b, (with b not zero)
so it is rational
2007-04-07 20:23:06 · answer #4 · answered by mikedotcom 5 · 0⤊ 1⤋
rational = 131/10
2007-04-07 20:21:24 · answer #5 · answered by hustolemyname 6 · 0⤊ 1⤋
It is rational because it exists.
An example of an IRRATIONAL number is this:
â-2
That is impossible.
You can't have the square root of a negative number.
But you CAN have a -2.
13.1 is a number that exists.
Therefore, it is rational.
You can look at this website for more explanation:
http://www.themathpage.com/aPreCalc/rational-irrational-numbers.htm
.
2007-04-07 20:21:32 · answer #6 · answered by ( Kelly ) 7 · 0⤊ 4⤋