The table shows how much a company charges for a cleaning job. Mrs Zhang paid the company $240 for a cleaning job. How many hours of cleaning did she pay for?
Charges | |
First 4 hours | $150 |
Every additional hour | $30 |
Charges | |
First 4 hours | $150 |
Every additional hour | $30 |
Charges | |
First 4 hours | $150 |
Every additional hour | $30 |
Charges | |
First 4 hours | $150 |
Every additional hour | $30 |
Charges | |
First 4 hours | $150 |
Every additional hour | $30 |