Which action describes an experimental investigation?

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

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?

The particles that are found in the nucleus of an atom are