In a Crooke's Tube, a stream of electrons boils off a negative electrode, or cathode, and flies through a vacuum toward a positive electrode, or...

In a Crooke's Tube, a stream of electrons boils off a negative electrode, or cathode, and flies through a vacuum toward a positive electrode, or anode. Often, the anode is given a distinctive shape, like a cross, so that the electrons that miss it and fly past will create a dramatic shadow on the far end of the glass tube. The stream of electrons is flowing past a certain point between the cathode and the anode at a rate of 3.50 A. If 95.0% of the electrons reach the anode,(a) How many electrons reach the anode during a period of 15.0 s?