Find the area of the purple shaded region
[2533] Find the area of the purple shaded region - Find the area of the purple shaded region. Express result to the accuracy of 3 decimal. - #brainteasers #math - Correct Answers: 45 - The first user who solved this task is Sanja Šabović
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Find the area of the purple shaded region

Find the area of the purple shaded region. Express result to the accuracy of 3 decimal.
Correct answers: 45
The first user who solved this task is Sanja Šabović.
#brainteasers #math
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An Inscription Problem

According to the Knight-Ridder News Service, the inscription on the metal bands used by the U.S. Department of the Interior to tag migratory birds has been changed. The bands used to bear the address of the Washington Biological Survey, abbreviated, "Wash. Biol. Surv." until the agency received the following letter from an Arkansas camper:
"Dear Sirs: While camping last week I shot one of your birds. I think it was a crow. I followed the cooking instructions on the leg tag and I want to tell you it was horrible."
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Edison patents

In 1883, Thomas A. Edison received a series of patent for some of his electrical inventions. One patent was for a "Dynamo-Electric Machine" (U.S. No. 278,419), and two for a "Regulator for Dynamo-Electric Machines" (No. 278,413 and -4). Three of the patents covered the "Manufacture of Incandescing Electric Lamps" (No. 278,415; -6 and -7), and one for an "Apparatus for Translating Electric Currents From High to Low Tension," (No. 278418). In addition a Design Patent No. 13940 was issued for a "Design for Incandescing Electric Lamp."
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