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Mathematics 25 Online
OpenStudy (anonymous):

Help with the cube root!

OpenStudy (anonymous):

\[\sqrt[3]{0.008y^3x^6}\]

OpenStudy (anonymous):

would it be 0.002yx^2?

OpenStudy (anonymous):

the second half is right, because: \[yx^2 * yx^2 * yx^2 = y^3x^6 \] however, the constant is wrong because: \[0.002^3 < 0.008\]

OpenStudy (anonymous):

remember, when you multiply a number less than 1 by itself, the number is even smaller.

OpenStudy (anonymous):

so you know that the constant has to be higher than 0.008, but less than 1.

OpenStudy (anonymous):

Ok. so would it be .2?

OpenStudy (anonymous):

well, with a calculator you'll find that: \[\sqrt[3]{0.008} \approx 0.126\]

OpenStudy (anonymous):

But .2 * .2 is .04, right? and then .04 * .2 is .008?

OpenStudy (anonymous):

omg, I'm sorry, lol... I was finding the cubed root of 0.002... my bad.

OpenStudy (anonymous):

yes, the cubed root of 0.008 = 0.2

OpenStudy (anonymous):

so, it's 0.2yx^2

OpenStudy (anonymous):

ok. THANK YOU!

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