A dog barks at a frequency of 500 Hz. How many cats can hear this sound?
Cats can typically hear sounds in the frequency range of 48 Hz to 85 kHz. Since 500 Hz falls within this range, it is likely that most cats would be able to hear a dog barking at this frequency. However, it's impossible to determine an exact number of cats that can hear this sound without more information about the specific population of cats being considered.