Using Only Five 5's and any mathematical operator make sum as 37

What does does this rebus picture means ?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

I am working in a bus company. The company recently went under expansion and therefore there was not enough room for all the buses. As a result, twelve buses had to be stored outside.

If the company decides to expand the garage space by forty percent, enough space to accommodate the current buses will be created leaving enough space for twelve more buses if the need arises in future.

Can you calculate the number of buses that the company owns at present?

Can you make four (4) nines (9) equal 100?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

What always comes into a house through the keyhole?

What goes through cities and fields, but never moves?

Which word does the below Plexor means ?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?