what is the doublung time if interest is compounded quarterly?
WHAT INTEREST RATE YOU HAVE IN MIND?
We have
2A = A(1 + r/4)^(4t ) divide by A
2 = (1 + r/4)^(4t) take the log of both sides
log 2 = 4t log ( 1 + r/4) divide both sides by 4log(1 + r/4)
log 2 / [ 4 * log (1 + r/4) ] = t where r is some rate of interest and t is the time in years
