Pre-Calc

After release at ground level, a balloon rises 100 feet in 30 seconds. During each succeeding 30 seconds, it rises 9/10
as far as it did in the preceding 30 seconds. What is its maximum altitude above ground level?

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  1. I know its supposed to be 1000 feet, but I just don't know how to get there. Any help would be great! Thanks so much:)

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