The price of a microchip declines by 67 percent every 6 months. At this rate, approximately how many years will it take for the price of an $81 microchip to reach $1? Choose the correct choice from the following answers
A) 1.5 years	B) 2 years	C) 3 years	D) 13 years	E) 13.5 years
I think the fastest way is   81 *(1/3)^n = 1   n =4   So 2 yrs   ANSWER:2 years
<result>B</result>
The price of a microchip declines by 67 percent every 6 months. At this rate, approximately how many years will it take for the price of an $81 microchip to reach $1?