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What is the measure of x? 43° 86° 172° 344°

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5