Coach Aldridge ran around the track at Bush HS which is 400 m long. If it took 65 seconds, what was his speed?

Idon’t quite understand this problem

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?

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical