Question

Simplify 1/2√40
A) √10
B) 2√10
C) 4√10

Answer 1

$\frac{1}{2} \sqrt{ {2}^{2} } \times \sqrt{10}$
that is:
1/2 * 2 *√10

= √10 therefore Option A is correct

Answer 2

It would br A)√10
If you want the work tell me.