The table shows how much a company charges for a cleaning job. Mrs Ma paid the company $450 for a cleaning job. How many hours of cleaning did she pay for?
Charges | |
First 4 hours | $270 |
Every additional hour | $60 |
Charges | |
First 4 hours | $270 |
Every additional hour | $60 |
Charges | |
First 4 hours | $270 |
Every additional hour | $60 |
Charges | |
First 4 hours | $270 |
Every additional hour | $60 |
Charges | |
First 4 hours | $270 |
Every additional hour | $60 |