Select the correct answer from the drop-down menu. People keep spending additional units of a particular resource on a want until their marginal benefit is their marginal cost.

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?

1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.

The necleus of an atom is made up of what subatomic particles?