How long does it take for an investment to double in value if it is invested at 8% per annum compounded monthly? compounded continuously?

2p=p (1+0.08/12) ^12n

2 = (1+0.08/12) ^12n

Log (2) = 12n*log (1+0.08/12)

12n=log (2) / log (1+0.08/12)

n=104.32/12

N=8.7 years

Continuously

2p=pe^rt

Now your turn solve with math to get the answer using the equation ... if you have problem with that just tell me