Multiple Choice Please select the best answer and click subm

Multiple Choice: Please select the best answer and click \"submit.\" The price of 9-volt batteries is increasing according to the function below, where t is years after January 1.1980. During what year will the price reach $5? P(t) = 1.1 middot e^0047t 2012 2008 2004 2016

Solution

P(t) = 1.1(e^0.047t)

P(t) = $ 5

5= 1.1e^(0.047t)

4.54 = e^(0.047t)

Taking log on both sides: ln( 4.54) = 0.047t

1.514 = 0.047t

t = 32.21 years

Now after 32 years from 1980 so, year 2012

Option A