what is $sqrt3{729}$?

Answer:

9

Explanation:

Step1: Recall cube - root definition

The cube - root of a number $x$, denoted as $\sqrt[3]{x}$, is a number $y$ such that $y^3=x$.

Step2: Find the number whose cube is 729

We know that $9\times9\times9 = 9^3=729$. So, $\sqrt[3]{729}=9$.