posted by Sarah .
How long will it take for an investment to double in value if it earns 9.5% compounded continuously?
For r=0.095, with normal compound interest, compounded yearly, the number of years to double at a rate of r% is ln(2)/ln(1+r)=ln(2)/ln(1.095)=7.638 years.
take ln both sides,
With continuous compounding,