If that ever happens (as a student) the students will go and hide in a corner where the bad people can’t see them in the class. And also they NEED THERE LIGHTS TURN OFF. If it is turn on there is a 99.9 chance that the people will come in your classroom. SO TURN THE LIGHTS OFF AND HIDE IN A CORNER WHERE THE POEPLE CANT SEE YOU
Answer:
Subtract your heart's resting rate from your maximum rate. For example, if you are 40 years old, subtract that number from 220; your maximum rate is 180. Next, subtract your resting rate or 80 in this example. Your heart-rate reserve is 100 beats per minute.
