document.write( "Question 945839: A new area code is needed for the city. How many options do they have if they cannot use 0 as the first number or the last number in the three digit area
\n" );
document.write( "code? (remember that they also cannot use 905 or 289 as they are already full)
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #577036 by Edwin McCravy(20054)![]() ![]() You can put this solution on YOUR website! \r\n" ); document.write( "They can choose the first digit any of 9 ways. (can't choose 0)\r\n" ); document.write( "They can choose the last digit any of 9 ways. (can't choose 0)\r\n" ); document.write( "They can choose the middle digit any of 10 ways. (can choose 0)\r\n" ); document.write( "That's 9x9x10 = 810 ways but we must subtract 2 for 905 and 289.\r\n" ); document.write( "\r\n" ); document.write( "Answer: 810-2 = 808 ways\r\n" ); document.write( "\r\n" ); document.write( "Edwin\n" ); document.write( " |