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When a certain tree was first planted, it was 4 ft. tall, [#permalink]
29 Jul 2007, 08:35
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When a certain tree was first planted, it was 4 ft. tall, and the height of the tree increased by a constant amount each year for the next 6 years. At the end of the 6th year, the tree was 1/5 taller than is was at the end of the 4th year. By how man feet did the height of the tree increase each year?
This was question 31 and it really threw my timing off. Quick approach please. I set up an equation but got stuck.