Answer:
7.64
Step-by-step explanation
This is what I did so I take the root of 144 = 12 and 12/3.14 = roughly 3.82 thats the radius and that times 2 = 7.64 have a great day success to homework yay! Have a great day!!! :D
Explanation:
AREA = pi r^2
144 = pi r^2 shows r = 6.77 m ( or sqrt ( 144/pi) )
then diameter = 2 * r = 13.54 m (or 2 sqrt (144/pi) )
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