Answer:
3/7
Step-by-step explanation:
The first black marble is 10/15 and the second is 9/14. Multiply them together to get 3/7 after you simplify it.
Answer:
0.01785714285
Step-by-step explanation:
You can round it to 0.18 or something but yeah
Area = πr² ⇒
81π = πr² ⇒ 81 = r² ⇒ r = √81 = 9 in
<span>Circumference = 2</span>πr = 2*9*π = 18π in
Make the equation:

To solve, add 136 to the other side and then divide by 2.