MadelineCxke MadelineCxke 14-10-2020 Mathematics contestada 10 4 4) Maureen has spent 12 9/10hours tutoring students in math and 6 3/4 tutoring students in science, Which choice is the best estimate for how many hours Maureen has spent tutoring? (A) 15 hours (C) 20 hours (B)25 hours (D) 30 hours