the price of 9-volt batteries is increasing according to the function below. where t is year after anuary 1,1980. during what year will the price reach 3 dollars?
p(t)=1.1*e^0.047t
*=multiply

Question

the price of 9-volt batteries is increasing according to the function below. where t is year after anuary 1,1980. during what year will the price reach 3 dollars?
p(t)=1.1*e^0.047t
*=multiply

btaylor · Answer

$$3=1.1e^{0.047t}$$$$2.7272=e^{0.047t}$$$$\ln(2.7272)=0.047t \ln(e)$$$$\ln(2.7272)=0.047t$$$$t=\frac{\ln(2.7272)}{0.047} = 21.346 years$$.
So 21 years after 1980 would be 2001

anonymous · Answer

@BTaylor HOLY CRAP YOURE A GENIUS THAN YOU SOOOO MUCHH sorry i didnt realize caps was on...