An airplane traveling from San Francisco northeast to Chicago travels 1280 km in 4 hours. What is the airplane’s speed?

320 kmh

Explanation:

You take how far it traveled and divide it by how many hours it took, and you get your answer.

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.