How long does it take a snail travel a distance of 3ft at 0.1ft/sec

There are 5280 feet in a mile.
There are 60 minutes in an hour.
There are 24 hours in a day. 
He moves at 2 feet every 3 minutes. 
We multiply by 20. 
This means he moves 40 feet every 60 minutes (one hour) 
Now we multiply by 24. 
He moves 960 feet every day. 
5280 / 960 will gives us how many days it will take to move a mile. 
5.5 days 
5 days 12 hours. < Answer 

That result from subduction of oceanic plates beneath lighter continental plates. most of the earth's volcanoes are located around the pacific ring of fire because that the location of most of the earth's subduction zones.

The answer is c) pyrite