Okay so you have 10/12 marbles (ten out of twelve). Both 10 and 12 can be divided by 2, right? So divide both of those by 2 and you get 5/6. That’s your answer. Hope this helps!
If patio is square it means that area of if is where a is one side Now we can substitute A=200 and solve eq a= a=14.1421 Now we are rounding to the nearest tenths a=14.1 because next number is 4 and is less then 5. The result is 14.1