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On product container, "Guarenteed Chemically Pure Aluminum" Bronze Powder? How would the expression (x^2+4)(y^2+4) be rewritten using Two Squares? A nail put into tree at height of 2m from ground.This tree grows at rate of 0.5m a year. How high above ground will nail be after 20 years.? Calculate the de Broglie wavelength of a 143-g baseball traveling at 89 mph.? Solve the laplace transform y"- 2y '+ y = e^-t , y(0)=0, y'(0)=1?