What is the below Rebus indicate?

Can you solve the maths in the below-given picture equation?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

What is the longest word in the dictionary?

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

Chocolate costs 6 rupees and a Toy costs 5 rupees. If you have 32 rupees in total, how many chocolates and how many Toys can be purchased with that amount?

What demands an answer, but asks no questions

A couple went on a climbing trip. But only the husband returned from the vacation and said that his wife slipped off while climbing and died. On investigating, the local sheriff arrested him saying, 'Your travel agent called. You murdered your wife.'

The man did not inform anyone about the trip. Then how was the agent so sure that it was a murder?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

Can you find out the total number of triangles in the given figure?