9 sandwiches per hour
step-by-step explanation:
when we have a rate, we want a 1 in the denominator
27/3 = 9
27 sandwiches/ 3 hours = 9 sandwiches/hour
the answer is c.
this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.