Use the Product Rule to Multiply $\sqrt { \frac { x } { 7 } } \cdot \sqrt { \frac { y } { 3 } }$

question 19

Multiple Choice

Use the product rule to multiply. Assume all variables represent positive real numbers.
- $\sqrt { \frac { x } { 7 } } \cdot \sqrt { \frac { y } { 3 } }$

• A) \(\sqrt { \frac { 3 x } { 7 y } }\)
• B) \(\frac { x y } { 21 }\)
• C) \(\sqrt { \frac { x y } { 21 } }\)
• D) \(\sqrt { \frac { 3 x + 7 y } { 21 } }\)