Answer:
B
Step-by-step explanation:
Rationalize the denominator. That means you multiply √10 on both the numerator and denominator of the question.
[tex]\dfrac{5}{\sqrt{10} } * \dfrac{ \sqrt{10} }{\sqrt{10} }[/tex]
The result is
[tex]\dfrac{5 \sqrt{10} }{10}[/tex]
Notice that the 5 in the numerator, partially cancels out with the 10 in the denominator.
The answer is [tex]\dfrac{ \sqrt{10} }{2}[/tex]
