Answer:
you could have used a calculator
Step-by-step explanation:
-2.8
Are you saying 9×10 that is 90
Set up a proportion:

=

To solve cross multiply:
3000x=300000
divide both sides by 3000:
3000x/3000=300000/3000
x=100
It will take her 100 hours to drive 4000 miles assuming she continues to travel at this rate.