Answer:
38.3 hours
Explanation:
Given data
We have been given the function that describes his pay, which is
y=6.50h
Where h is the number of hours
now we have the amount y= 249
substitute
249=6.50*h
make the subject of the formula
249/6.5=h
h=38.3
Hence he needs to work for at least 38.3 hours