Find the area of the shaded region
Find the area of the shaded region accurate up to 3 decimal places. (A=?, a=2389, b=1389)Correct answers: 23
The first user who solved this task is Sanja Šabović.
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Telephone demonstrationIn 1877, a pianist performed in Philadelphia, and an audience heard the performance in New York. It was an important early demonstration of Alexander Graham Bell's new invention, the telephone. |