Answer:
14 hours
Step-by-step explanation:
$80 transportation costs + $220 food costs + $720 hotel costs ($90 x 8 nights) = $1020 total cost
$1020 - $684 in savings = $336.00 still needed for trip
$336.00 divided by $24.00/hr for tutoring = 14
William will need to tutor 14 hours to earn the rest of the money for his trip.
Happy Monday!