document.write( "Question 1086931: A ball on a pendulum moves 50 cm on its first swing. On each succeeding swing back or forth it moves 60% of the distance of the previous swing. Write the first four terms of the sequence of swing lengths.
\n" ); document.write( "a. 50, 30, 18, 10.8
\n" ); document.write( "b. 30, 18, 10.8, 6.48
\n" ); document.write( "c. 50, 20, 8, 3.2 \n" ); document.write( "

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The first four swings includes the first swing, which is 50 cm.
\n" ); document.write( "That excludes b.
\n" ); document.write( "60% of 50 is 30, so the second term is 30 cm.
\n" ); document.write( "a. \n" ); document.write( "

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