Assuming the carbon cycle is a closed system, which of the following statements is true?

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -

Based on her survey, which advertising mediums will work best to publicize leslie's in-store specials?

Collin would like to use the data a coworker has entered in a database. the problem is the coworker's database software is different from collin's. collin should