# The veterinarian listens to your cat's heart and counts 30 beats in 15 seconds. what is your cat's heart rate?

((cancel30^2 " beats")/(cancel15 cancel" seconds"))((60 cancel" seconds")/(1 " minute"))=(120 " beats")/"minute"

#### Explanation:

Usually heart rate is measured in $\text{beats"/"minute}$, and so we can find that by saying:

((cancel30^2 " beats")/(cancel15 cancel" seconds"))((60 cancel" seconds")/(1 " minute"))=(120 " beats")/"minute"

By the way, a cat's normal heart rate is between 140 and 220 beats per minute, so this cat's owner should be calling the vet!