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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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Brian Regan: New Baby Greeting Cards

They have a section called, New Baby. I dont think you need the word new. Theyd have to clear up confusion. Do you have an Old Baby section? Cause my friends had a baby, and I let time get away from me, and hes 12.

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Sir John Cockcroft

Born 27 May 1897; died 18 Sep 1967 at age 70.Sir John Douglas Cockcroft was a British physicist, who shared (with Ernest T.S. Walton of Ireland) the 1951 Nobel Prize for Physics for pioneering the use of particle accelerators to study the atomic nucleus. Together, in 1929, they built an accelerator, the Cockcroft-Walton generator, that generated large numbers of particles at lower energies - the first atom-smasher. On 14 Apr 1932, they used it to disintegrate lithium atoms by bombarding them with protons, the first artificial nuclear reaction not utilizing radioactive substances. They were first to split the atom. They conducted further research on the splitting of other atoms and established the importance of accelerators as a tool for nuclear research. Their accelerator design became one of the most useful in the world's laboratories.«

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