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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Answer:
the farmer planned to have the work done in 6 days, and the area of the farm field is 120 times 6 = 720 hectares.
8x(5x2+3)=8x(15+3)=8x13=104
Answer: -5/3
Step-by-step explanation:
Use the slope formula: 
You substitute the numbers in and subtract to get -5/3.