Find the sum and express it in scientific notation. 0.00348 + (6.2 x 10^-2) a) 2.176 x 10^-4 b) 6.2348 x 10^-2 c) 6.2348 x 10^-1 d) 6.548 x 10^-223 points plz

What is the 12th term of b(n)=-4-2(n-1)

Which value would be a solution for x in the inequality 47-4x< 7

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