## Thinking Mathematically (6th Edition)

$2\sqrt5$
Use the quotient rule $\dfrac{\sqrt{a}}{\sqrt{b}}=\sqrt{\dfrac{a}{b}}$, where $a$ and $b$ are nonnegative numbers and $b\ne 0$ to obtain: $=\sqrt{\dfrac{60}{3}} \\=\sqrt{20} \\=\sqrt{4(5)} \\=2\sqrt5$