5 of the 6 exits were men, so the experimental probability that a man exits the room is 5/6.
If y=mx+b,

You can't differentiate a constant, so dy/dx=m.
Answer: 
Step-by-step explanation:
We know that the circumference of a circle is given by :-
, where r is the radius of the circle .
Given : Circumference of circle = 16 cm
Then, 
i.e
(1)
We know that the area of circle is given by :-

i.e.
[From (1)]
i.e.
i.e.
Put 
Hence, area of circle = 