A maths symbol is hidden in the below Bar Graph. Can you decipher it?

What is the word or phrase?

People make me, save me, change me, raise me. What am I?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside. The man said, "Oh! I am really sorry, I thought this was my room." He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man. What made her suspicious of that man? He might have been genuinely mistaken.