What is the main difference between homogeneous and heterogeneous mixtures

Where is my favorite place to eat?

Which of the following is s good strategy to use when preparing to take notes in class

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?