Washington Irving. ... He is best known for his short stories "Rip Van Winkle" (1819) and "The Legend of Sleepy Hollow" (1820), both of which appear in his collection, The Sketch Book of Geoffrey Crayon, Gent.
I would say D is NOT one of the reasons why life is found only on Earth
Sin(a)=opposite/hypotenuse
∴hypotenuse=√20²+21²
=√400+441
=√841
=29
∴sin(a)=20/29
=0.6897
cos(a)=adjascent/hypotenuse
=21/29
=0.7241
Answer:
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Explanation: