Electricity problem from jan. 1959 issue of qst; using ohm's law find.

Which statement correctly describes the relationship between frequency and wavelength?

Anybody wanna ? (picture included? )

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?