Question 1105209
Rule of 72 would say 18 years
1800=900(1+(.04/12))^12t, t is number of years

2=(1.00333)^12t
ln2=12t(ln(1.0003333), without rounding, divide ln 2 by 12 ln (1.0033333)
17.36 years ANSWER
(1.(04/12))^208, the 208 being approximately 17.36 years is 1.998.