Find the area of the black region
[2917] Find the area of the black region - Find the area of the black region accurate up to 3 decimal places. (A=?, a=20, b=10) - #brainteasers #math #riddles - Correct Answers: 39 - The first user who solved this task is Sanja Šabović
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Find the area of the black region

Find the area of the black region accurate up to 3 decimal places. (A=?, a=20, b=10)
Correct answers: 39
The first user who solved this task is Sanja Šabović.
#brainteasers #math #riddles
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You Might Be A Redneck If...

You might be a reneck if...
Any time your kids see a dog they get out their ropes and lasso it and tackle it to the ground.
Your master bathroom has the words "porta" and "potty" written on the side.
You can't take a bath in the winter 'cause the stream is frozen.
You only bathe when it rains.
You think "Dueling Banjos" is classical music.
You refer to the Surgeon General's Warning on a pack of cigarettes as your medical encyclopedia.
You go to garage sales to shop for Christmas gifts.
You're 42 and still have clowns come to your birthday party.
You think 'possum is the "other white meat".
Your husband spray paints the upholstery of your car to make it look new.
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Spectrophotometer

In 1935, the first U.S. patent for a spectrophotometer was issued to Professor Arthur Cobb Hardy of Wellesley, Mass. (No. 1,987,441) which he called a “photometric apparatus.”It could detect two million different shades of colour and make a permanent record chart of the results. The patent was assigned to the General Electric Company of Schenectady, N.Y. which sold the first machine on 24 May 1935. It used a photo-electric device to receive light alternately from a sample and from a standard for comparison. It eliminated any need for the two beams (from sample and from standard) to travel different optical paths which in previous designs could introduce inaccuracies if one path varied from the other.«[Image: a "GE-Hardy" double-beam recording spectrophotometer photographed in 1938 showing Walt Disney with the instrument at his studios.]
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