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OpenStudy (anonymous):
is the square root of 400 iratinal or ratinal explain?
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OpenStudy (phi):
whole numbers are rational 400 can be written as 4*100 both are perfect squares and you can do sqrt(4)*sqrt(100) what do you think?
OpenStudy (anonymous):
so i thought it was rational ?
OpenStudy (phi):
yes. sqrt(400) = 20 20 is a whole number, so it is rational rational from ratio: a whole number divided by another whole number. 20 can be thought of as 20/1 so it is rational
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