Jackie deposited $5 into a checking account in February. For each month following, the deposit
amount was doubled. How much money was deposited in the checking account in the month of
August? determine whether the problem should be solved using the formula for an arithmetic sequence, arithmetic series, geometric sequence, or geometric series.

Question

Jackie deposited $5 into a checking account in February. For each month following, the deposit 
amount was doubled. How much money was deposited in the checking account in the month of 
August? determine whether the problem should be solved using the formula for an arithmetic sequence, arithmetic series, geometric sequence, or geometric series.

anonymous · Answer

geometric sequence, and it's $5(2^x), where x is number of months passed. $5(2^6)=5(64)=320

anonymous · Answer

Yes, I am using the geometrict series formula too. I'm checking my answer now :) I got 640 since there are Feb-August (8 months). Is this correct?

anonymous · Answer

OK...320 is correct !

anonymous · Answer

8 Jan-Aug, but 7 Feb-Aug

anonymous · Answer

Thank you. I corrected my mistake. Did you also get 320?