A monkey increases its gravitational potential energy by climbing to the top of a tree. What happens to that potential energy if he climbs back down halfway? Group of answer choices

It would decrease by three fourths.

It would double.

It would remain the same.

It would decrease by half.

Which of the following represents a virtual image?

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

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?