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Find the length of red arc AB

Find the length of red arc AB (r1=1, r2=2). Express result to the accuracy of 3 decimal.

Correct answers: 43

The first user who solved this task is Roxana zavari.

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No Male Pallbearers

An elderly woman died last month. Having never married, she requested no male pallbearers. In her handwritten instructions for her memorial service, she wrote, "They wouldn't take me out while I was alive, I don't want them to take me out when I'm dead."

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Matthias de L'Obel

Died 3 Mar 1616 (born 1538).French physician and botanist whose Stirpium adversaria nova (1570; written in collaboration with Pierre Pena) was a milestone in modern botany, a collection of notes and data on 1,300 plants that he had observed and gathered in France and England. In this book, he argued that botany and medicine must be based on thorough, exact observation. L'Obel divided plants according to the form of their leaves. His two professions were closed related, as most medicines derived from plants. Thus, l'Obel managed several gardens of herbs, and wrote on them. The popular garden perennial Lobelia was named by Linneaus for him. (De l'Obel is French for "of the white poplar" and his family coat of arms was a poplar leaf.)

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