215 because you would add and subtract the numbers as you go them you come out with your answer
Mono means one..but monomial can also a negative. Mono meaning one means there is a single variable.
2 hours = 45 pages
1 hour = 45 ÷ 2 = 22.5 pages
12 hours = 22.5 x 12 = 270 pages
Answer; 270 pages