The area of a circle is given in terms of its radius by
A = π · r²
Your circle has r=4 (half the diameter) and you want π=3.14. Using these values in the formula gives
A = 3.14 · 4²
This matches your first selection
3.14 · 4²
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All students will have a chair to their needs. So a 100% probability.
-6*3 =-18
11*4=44
-18/44. Reduce. Divide top and bottom by 2
-9/22
For every 3 squares there are 2 circles
