Yolo4mecuite
Which number is irrational?
Select one:
a. √169
b. √144
c. √81
d. √156
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Azteck
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What's a rational number?
Yolo4mecuite
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A rational number is a number that can be expressed as a fraction or ratio (rational). The numerator and the denominator of the fraction are both integers.
Azteck
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A rational number can also be a whole number.
Azteck
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so the square root of 169 is 13, correct?
Azteck
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The number 13 is a rational number because it's a whole number.
godorovg
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yes 13 is right for 169
Azteck
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That means option A is not irrational, thus not the correct answer.
Azteck
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Option B is not irrational as well because that will give you 12. So is option C. That also gives you a whole number of 9.
Azteck
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Tell me what option D would give me? @Yolo4mecuite
godorovg
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option D is 12.5 for squr 156
Yolo4mecuite
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Yeah ^^^^
Yolo4mecuite
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So D is rational
godorovg
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no we are looking for irrational
Yolo4mecuite
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Yes sorry
Yolo4mecuite
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12.5 is not s whole number so it is irrational
godorovg
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I knew it was D, was just trying to teach
Yolo4mecuite
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Oh ok Thank you! :)
godorovg
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hope I helped not hindered here.
Azteck
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12.5 is a rational number. That's a fraction with integers. The square root of 156 does not contain recurring numbers which means it's irrational.
godorovg
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yep you are right :)
godorovg
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good job..
SWAG
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Nice Work!