Answer:

Step-by-step explanation:
Area of Circle can be calculated using following formula

Where r is radius of circle
<u>Area of outer circle (r=11 yd)</u>

<u>Area of inner circle (r=8 yd)</u>

Area of shaded region


O+6-2O=-8
subtract 6 from both sides
the equation is then O-2O=-14
combine like terms on the left side
the equation is then -O=-14
divide by -1
final answer is O=14