Answer:
by measuring calender we can find
Explanation:
Answer:
almost 100% positive its B but dont take me up on it
Is there a graph we can look at?
Answer:30 cm
Explanation:
Given
object distance 
focal length of concave mirror 
height of object 
Using mirror formula




and magnification is



So height of object is same as of object .
Position :image is formed at the spot where object is placed.