Explain the theory of plate tectonics and how they have changed earth’s surface over time. Include the role of plate tectonics in the creation of landforms. << read less.

When amy exercises in her fitness center for 1 hr she burns a total of 475 calories.if she burns 9 calories a minute jogging on the treadmill and then burns 6.5 calories a minute pedaling on the stationary bicycle how many minutes of the hour does she spend exercising on the bicycle?