For a concave mirror, the radius of curvature is twice the focal length of the mirror:

where f, for a concave mirror, is taken to be positive.
Re-arranging the formula we get:

and since the radius of curvature of the mirror in the problem is 24 cm, the focal length is
Answer:
20 degrees.
Explanation:
this is my answer hope that I will help you
The answer is B-plus.
The object is accelerating to the right, and up.