## Intermediate Algebra (6th Edition)

$$\frac{ \sqrt { 21 \pi v}}{7 \pi}$$
$$\sqrt { \frac{3v} {7 \pi}}$$ We rationalize the denominator: $$\sqrt { \frac{3v} {7 \pi}} \times \sqrt { \frac{7 \pi} {7 \pi}}$$ This gives: $$\frac{ \sqrt { 3v*7 \pi}}{7 \pi}$$ $$\frac{ \sqrt { 21 \pi v}}{7 \pi}$$