If area is 81pi then 81pi=pir^2. Divide both sides by pi and we are left with r^2=81 take the square root of both sides to find the radius is 9 then plug that into the equation for circumference(2pir) so 2pi(9)=18 pi so the answer is E 18pi
Answer:
Assuming you are talking about segment QS, it's 12 units.
Step-by-step explanation:
10+2=12.
Step-by-step explanation:11/8 is 12.5 goes into one hundred 8 times so 12 x 11 is 137.5so then turn decimals to a percent 1.405 is 140.5 1.45 is 145 so the it is 137.5 140.5,145
Answer:

Step-by-step explanation:
comon sence
Hope this help you
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Red
Answer:
A
Step-by-step explanation:
The opposite of 6 IS -6