Answer: 18 years
Explanation: The formula for calculating the number of periods is
n = log (
) / Log (1+r)
PV = $1,100,000
P = 95,000
r = 0.05122
log is the natural logarithm (you will find it on your calculator as log or on Excel as LN( )
n = log (
) / Log (1+0.05122)
= log (
) / log (1.05122)
= log (
) / log (1.05122)
= log
/ log (1.05122)
= log 2.4574 / log (1.05122)
= 17.99 years
Approximately 18 years