Answer
$4y^{3}$
Work Step by Step
$(4y^{3){2}} = 4^{2} \times y^{6} = 16y^{6}$
or...
$\sqrt 16 = 4, and \sqrt y^{6} = y^{3} = 4y^{3}$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.