then the electric current at this point is ... A) 1.8 A B) 3.2 A C) 9 x 1044 A D) 6.9 X 1037 A

Question

 If approximately 4.0 x 10 electrons pass a given point in a circuit every hour,

Answer 1

Let the input be 4.0 x 10^x. (4.0 x 10^x e^- /hr) (1 hr/3600 s) (1.6 x 10^-19 C /e^-) = 1.8 x 10^x-22 [C/s = Amps]. When you find the missing exponent, there's your answer.