Answer:
The semi annual rate is 4.88%
Explanation:
semi annual rate = [((1+r)^(1/n)) -1]
= [((1+10%)^(1/2)) -1]
= 4.88%
Therefore, the semi-annual rate (i.e. periodic return per six months) do you require (i.e. need to earn such that this implies 10% earned per year when you get to compound semi-annually) is 4.88%.