if you divide something by another thing, then you get the first thing over the second. This may sound obvious, but the same goes for the units
by dividing 210 heartbeats within 3 minutes, you would get heartbeats over minutes, or 210 heartbearts over 3 minutes. just divide 210 by 3 to get the number, then label the units as heartbeats over minutes.
Answer:
Step-by-step explanation:
rate=total beats/time=210/3=70 beats /minute
