I think the answer would be c.
Hope its right.
The descent of the balloon would take 14 minutes
To find the answer to this problem, take the elevation change (315) and then divide it by the rate of descent (22.5)
ANSWER
Positive:

Negative;

EXPLANATION
The given point is

This is a point in the second quadrant.
In this quadrant, only the sine function and its reciprocal, the cosecant are positive.
The cosine, tangent,cotangent, and cosecant functions are negative.