The formula for findinginterst is i=?

Question

The formula for findinginterst is i=?

Answer 1

i=ptr/100 where p is the principal t is the time and r is the rate

Answer 2

the simple interest

I= PNR/100

where P represent the principle

N number of years and

R the rate of interest

and for compound interest

I = P(1+NR/100)

Answer 3

i=pnr/100

where p=principle

           r=rate of intrest

            n=no of years

and why this question is here under Formula 1 category!!!!

let me tell you formula 1 doesn't mean u get all the formulas of the world here...ITS AN WORLD FAMOUS RACING EVENT!!!!!!!!!!!!!