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Mathematics 5 Online
OpenStudy (anonymous):

An electronic game manufacturer that produces a new product estimated that annual sales will be 8,000 units. Each year 10% of the units have been sold stop working. Therefore, 8,000 units will be in use after one year, {8000 + 0.9 (8000)} units will be in use after two years, and so on. How many units will be in use after n years?. Please help!

OpenStudy (amistre64):

An electronic game manufacturer that produces a new product estimated that annual sales will be 8,000 units. Each year 10% of the units have been sold stop working. Therefore, 8,000 units will be in use after one year, {8000 + 0.9 (8000)} units will be in use after two years, and so on. How many units will be in use after n years?. lets use k instead of 8000 for clean up k k+.9k k+.9k + .9.9k k+.9k + .9.9k + .9.9.9k etc... its a geometric sum

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