My monthly electric energy usage is 200 kWh. If I sell the excess electricity back to my utility company at a rate of $0.16/kWh, how much money will I get from my utility company in a month? Show your work.

A. Mass-extinction events are times in the Earth's history when few species evolve.

Explanation:

The extinction that occurred 65 million years ago wiped out some 50 percent of plants and animals. The event is so striking that it signals a major turning point in Earth's history, marking the end of the geologic period known as the Cretaceous and the beginning of the Tertiary period.

A wide range of animals and plants suddenly died out, from tiny marine organisms to large dinosaurs.

Species go extinct all the time. Scientists estimate that at least 99.9 percent of all species of plants and animals that ever lived are now extinct.