Answer:
The cow's heart beats at 65 beats per minute
Step-by-step explanation:
To solve the per minute, take the total heartbeat number and divide it by the amount of minutes like so:
Pig: [tex]\frac{225}{3}[/tex]
Horse: [tex]\frac{180}{4}[/tex]
Cow: [tex]\frac{520}{8}[/tex]
Dog: [tex]\frac{540}{6}[/tex]
Now all that you have to do is simplify them to get the following values:
Pig: 75 beats per minute
Horse: 45 beats per minute
Cow: 65 beats per minute
Dog: 90 beats per minute
