Explanation:
If Sandra works for 42 hours per week and her weekly wage is £389.76, her hourly wage can be calculated as follows:
£389.76 / 42 hours = £9.28 per hour
When she receives a pay increase of 35p per hour, her hourly wage becomes:
£9.28 + 0.35 = £9.63 per hour
Her new weekly wage can then be calculated as:
£9.63 per hour * 42 hours = £404.66
So Sandra's new weekly wage is £404.66 after receiving a pay increase of 35p per hour.