Question 1130801
P=Po(1+.005)^n
P/Po=2
2=1.005^n
ln2=n*ln(1.005)
n=138.98
for 1.5%
P=Po(1.015)^n
ln2=n*ln(1.015)
n=46.56 months

for 2.5%
ln2=n*ln(1.025)
n=28.07 months.

3 years for 0.5%
1.005^36=1.20 times the original
5 years for 0.5%
1.005^60=1.35 times the original