document.write( "Question 107244: For 68 days in a row, a person receives twice the number of pennies as the day before (day 1 - .01, day 2 - .02, day 3 - .04, day 4 - .08...........). What is the sum of the total 68 days? \n" ); document.write( "
Algebra.Com's Answer #78054 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! 2^0+2^1+2^2+2^3...+2^67=?\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "this is much easier to see in binary\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "1111111111111111111111111111111111111111111111111111111111111111111 \n" ); document.write( "...is the same as... \n" ); document.write( "10000000000000000000000000000000000000000000000000000000000000000000-1\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(look at the source) \n" ); document.write( " |