If the height of a water wave is doubled, how much will the energy increase?

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !