The table shows how much a company charges for a cleaning job. Mrs Koh paid the company $640 for a cleaning job. How many hours of cleaning did she pay for?
Charges | |
First 4 hours | $290 |
Every additional hour | $70 |
Charges | |
First 4 hours | $290 |
Every additional hour | $70 |
Charges | |
First 4 hours | $290 |
Every additional hour | $70 |
Charges | |
First 4 hours | $290 |
Every additional hour | $70 |
Charges | |
First 4 hours | $290 |
Every additional hour | $70 |