Answer:
$15.8666666667 an hour on average
Explanation:
14/7.5=1.8666666666
this means that for every hour the proofreader is working he proof reads 1.8666667 pages since he makes 8.5 for every page we have to multiply the pages per hour times the salary of every page to get his average hourly wage
1.8666666666 * 8.5 = $15.8666666667 an hour on average