Pls answer the remaining questions of 4,5,6,7,8,9

World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course. a. 12.5m/s b. 1.33m/s c. 13.3m/s d. 1.25m/s

Individuals do not compete directly for resources, but are prey for the same predator

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above