1. Simplify the expression $\sqrt{72x^3y^6}$. The simplified form is ___.
2. Which expression is equivalent to $\sqrt{p^9}$?
3. For the data set {5, 15, 8, 20, 11, 3, 18}, what is the upper quartile (Q3)? The answer is ___.
4. For the data set {2, 14, 8, 10, 20, 6, 18}, which of the following statements is true?
5. Simplify the expression $\sqrt{45k^7m^4}$. The simplified form is ___.
6. Simplify the radical expression \(\sqrt{48}\) completely. The simplified form is ___.
7. A right triangle has legs with lengths of 5 inches and 12 inches. What is the length of the hypotenuse in inches? ___
8. A right triangle has a hypotenuse of length 15 units and one leg of length 12 units. What is the length of the other leg? ___