13ft you would do 5^2+12^2 with a answer of 169 then you do the square root of that to get 13
We just need to solve the equation in order to find the value.
So we subtract 5 from both sides of the euqation and get
Now we divide by 3 on both sides and get
So the answer is C.
Hope this helps!
0.06 x 0.5 = 0.03 (I think that is what you're asking)