Simplify 5/v10 plz help

Choice 3:

Step-by-step explanation:

The first thing is that you have to break the √10. The only way you can break it is to make it into a 5 and a √2. So now it should look like this . Then we will divide the 5 by 5 and that'll become 1, so we are left with a and that's it.

the answer is 0.3175 hope that you ^w^

also you might actually want to put this picture up if you want people to solve it luckily i remember this question

the answer is 489

step-by-step explanation: