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Find the area of the shaded figure

Express result to the accuracy of 2 decimal.

Correct answers: 69

The first user who solved this task is Djordje Timotijevic.

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What Will The Neighbors Think?

Jack was living in Arizona during a heat wave when the following took place.
"It's just too hot to wear clothes today," complained Jack as he stepped out of the shower. "Honey, what do you think the neighbors would think if I mowed the lawn like this?"
"Probably that I married you for your money."

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Classification of geological eras

In 1759, Italian geologist Giovanni Arduino (1714-1795) dated a letter to Professor A.Vallisneri the younger, in which Arduino proposed a classification of Earth's surface rocks according to four brackets of successively younger orders: Primary, Secondary, Tertiary and Quaternary. These are the four geological eras used today. The volcanic rocks without fossils which he saw in the Atesine Alps that formed the cores of large mountains he called Primary. Overlying them, the fossil rich rocks of limestone and clay that were found on the prealpine flanks of the mountains he called Secondary. The less consolidated fossil-bearing rocks of the subalpine foothills, he named Tertiary, and the alluvial rock deposits in the plains were the Quaternary.«

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