Answer:
4:11
Step-by-step explanation:
11 students in class, and 11-7=4 so there are 4 girls 4:11
The answer is 8, first you convert 16 1/8 into a decimal and that is 16.125 and then you divide 129 by 16.125 :)
Correct answer is C.

Or check if f(0.2) = 0 to eliminate A and B.
Then check if f(-0.5) = 0 to eliminate D.