Question

What is the square root of 0.785 rounded

Answer 1

The square root of any number: square root of 100 is ten because its ten times itself equals 100. See how to do it? 

Now onto the question, we're trying to find the square root of: 0.785

Well, it is: .8860022573  
But in shorter terms, meaning when rounded, Our answer will come out to be
$\left[\begin{array}{ccc}.886\\\end{array}\right]$

Answer 2

Squareroot of .785 is .8860

you didn't specify what you wanted it rounded off to

possibilities are .9
                         .89