Subject: The exact formula for terminal velocity with its algerbraic symbols

I am doing a GCSE Physics investigations concerning the rate of descent of 
a parachutist.  Despite looking at the archives, the different formulae 
given, has made me even more confused.  I need the exact formula for the 
terminal velocity including explanations of the algerbraic symbols.  Also, 
what is the connection between the formula and the mass of the parachute 
and the acceleration of gravity.  Thank you.

Re: The exact formula for terminal velocity with its algerbraic symbols