Whick error did she do and what the correct answer

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

Atorch and a battery cost 2.50 altogether. the torch costs 1.50 more than the battery. what fraction of the total price is the torch? give your answer in its simplest form.