The table shows how much a company charges for a aircon servicing job. Mrs Chen paid the company $290 for a aircon servicing job. How many hours of aircon servicing did she pay for?
Charges | |
First 3 hours | $110 |
Every additional hour | $30 |
Charges | |
First 3 hours | $110 |
Every additional hour | $30 |
Charges | |
First 3 hours | $110 |
Every additional hour | $30 |
Charges | |
First 3 hours | $110 |
Every additional hour | $30 |
Charges | |
First 3 hours | $110 |
Every additional hour | $30 |