document.write( "Question 247357: In the past, a local telephone number in the U.S. consisted of a sequence of
\n" ); document.write( "two letters followed by five digits. Three letters were associated with each number from 2
\n" ); document.write( "to 9 (just as in the standard telephone layout shown in the figure) so that each telephone
\n" ); document.write( "number corresponded to a sequence of 7 digits. How many different sequences of 7 digits
\n" ); document.write( "were possible? \n" ); document.write( "

Algebra.Com's Answer #180459 by stanbon(75887) $\"\"$ $\"About$

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In the past, a local telephone number in the U.S. consisted of a sequence of
\n" ); document.write( "two letters followed by five digits. Three letters were associated with each number from 2 to 9 (just as in the standard telephone layout shown in the figure) so that each telephone number corresponded to a sequence of 7 digits. How many different sequences of 7 digits were possible?\r
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\n" ); document.write( "Assuming that both letters and digits can be repeated
\n" ); document.write( "the number of sequences would be 26^2*8^2 = 43,264
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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