You didn't post any option, but the ration roots theorem states that all possible rational roots of a polynomial come in the form

where p divides the constant term and q divides the leading term of the polynomial. So, in your case, p divides 3 (i.e. it is 1 or 3), and q divides 5 (i.e. it is 1 or 5).
So, the possible roots are

For the record, this parabola has no real roots.
Let's check
Remove root over and simplify 1+cot²Ø
- 1+cos²theta/sin²theta
- sin²Ø+cos²Ø/sin²Ø
- 1/sin²Ø
- cosec²Ø
Putting root over
Sin can be found also along with csc
Write the times for each hour from start time:
10:25 am
11:25 am
12:25 pm
1:25 pm
2:25 pm
3:25 pm
4:25 pm
5:25 pm
6:25 pm
There are 8 hours between 10:25 am and 6:25 pm.
they finished at 6:15 which is 10 minutes before 6:25 ( 25-15 = 10)
10 minutes less than a full hour is 50 minutes ( 60 - 10 = 50)
8 hours - 1 hour = 7 hours
7 hours + 50 minutes = 7 hours 50 minutes total time.
2/3=0.666=66.6% of homework
4/7=0.57=57% of homework
Therefore Tina completed more homework
Hope this helps!