Find the area of the shaded ...
[3223] Find the area of the shaded ... - Find the area of the shaded region accurate up to 3 decimal places. (A=?, a=1542) - #brainteasers #math #riddles - Correct Answers: 32 - The first user who solved this task is Allen Wager
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Find the area of the shaded ...

Find the area of the shaded region accurate up to 3 decimal places. (A=?, a=1542)
Correct answers: 32
The first user who solved this task is Allen Wager.
#brainteasers #math #riddles
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A lawyer calls a plumber for help...

The plumber assesses the situation and says, "I can fix it today for $800."

The lawyer, surprised, asks, "How long will it take?" The plumber replies, "I'll need about an hour to get a part from the supply house and another hour to do the repair."

The lawyer, smirking, says, "Two hours for $800? That's $400 per hour! I'm a lawyer, and I charge $350 per hour!"

The plumber nods and says, "Yes, I understand. That's why I left my law practice."

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Hearing aid

In 1880, the first U.S. patent for an electric hearing aid was issued to Francis D. Clarke and M.G. Foster, titled a Device for Aiding the Deaf to Hear (No. 226,902). The device employed bone conduction by which sound is passed through vibration of the skull bone. It was not until 1901 that the first commercially available hearing aid was produced, the Acousticon, invented by Miller Reese Hutchinson..
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