Can some explain plain how to do part d. i understand all but part d. i know that you take 3.14 x 10 to the power of 2. which gives me 78.5. but this is divider by 4 and don’t understand how they got the 4. explain

1.3

step-by-step explanation:

3x2=6   9x+6

bring down the 6 on both sides

6+6=12

12= 9x

divide by 9

12/9 =

1.3 =x

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.