on june 1, 2009, the price of gas was $1.79 per gallon. The price is predicted to increase .3% per month. if that prediction is correct, about how many months, to the nearest whole number, will it take for the price of a gallon to reach $1.90?

Question

anonymous · Answer

what equation do i use?

anonymous · Answer

the number of favorable cases
comb of 10 by 2=the total number of cases
ohhh the next i know how to do them...but really the process is so long...
sorry

anonymous · Answer

IN SHORT 

 It will take 20 months. Since it is increasing 0.3% each month (that means that after each month the price increases, 0.3% of the previous month. i.e. a recursive calculation... You can either use a summation formula or (faster) to just keep multiplying your answer by 1.003 each time since it was a small number of price increases.