A class begins at 8:30 a.m. and ends at 9:05 a.m. on the same day. In minutes, what is the length of the class?
(A) 15
(B) 25
(C) 35
(D) 45
(E) 75
There are 30 minutes between 8:30 a.m. and 9:00 a.m.

There are 5 minutes between 9:00 a.m. and 9:05 a.m.

Therefore, the length of the class is $30+5=35$ minutes.

ANSWER: (C)