set up a proportion: [tex] \frac{3000}{75} [/tex]=[tex] \frac{4000}{x} [/tex] 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.
