document.write( "Question 210709: A balloon is rising from the ground at 4 feet per second. Another balloon is at 756 feet and descending at 3 feet per second. In how many seconds will the be at the same altitude? \n" ); document.write( "
Algebra.Com's Answer #159183 by Alan3354(69443)\"\" \"About 
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A balloon is rising from the ground at 4 feet per second. Another balloon is at 756 feet and descending at 3 feet per second. In how many seconds will the be at the same altitude?
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\n" ); document.write( "The balloons are closing at 7 ft/sec (4+3), so it will take 756/7 = 108 seconds.
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