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For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i