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Find the area of the shaded figure

Express result to the accuracy of 3 decimal.

Correct answers: 51

The first user who solved this task is Djordje Timotijevic.

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Why are the blinds drawn...

As the lawyer slowly came out of the anesthesia after surgery, he said, "Why are all the blinds drawn, doctor?"

"There's a big fire across the street", the doctor replied. "We didn't want you to think the operation was a failure."

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Ernst Heinrich Weber

Born 24 Jun 1795; died 26 Jan 1878 at age 82.German anatomist and physiologist whose fundamental studies of the sense of touch introduced a concept, important to psychology and sensory physiology, that of the "just-noticeable difference", the smallest difference perceivable between two similar stimuli. With his brother Eduard Friedrich Weber (1806-71) he discovered the inhibitory power of the vagus nerve (1845). With another brother, W. E. Weber, he made studies of acoustics and wave motion. He formuled Weber's law: that the increase in stimulus necessary to produce an increase in sensation is not fixed but depends on the strength of the preceding stimulus.

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