What is 6÷2(2+1)? explain how did you get the answer

+9

Step-by-step explanation: When you have a set of parentheses in an order of operations problem, you must simplify what's inside that set of parentheses first before you do anything else. So our first step here is to add 2 + 1 which gives us 3.

So in our next step we have 6 ÷ 2 (3).

Now we do division next since it appears first.

So we divide 6 ÷ 2 to get 3.

Now we have 3 (3) which is +9.

395.84

step-by-step explanation:

2πrh+2πr²

2 (pie)(radius)(height)+2(pie)(radius)^2