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# A child parents promised to give 10$on her 12th birthday and double the gift on every subsequent birthday until the annual gift

exceeded 1000$.how can determine old of the child will be when the Last amount is given and total amount the child will have received ??

5 Answers

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please how can solution this question

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how can answer about this question?

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This is a geometric sequence, so you can find the answer by using the geometric sum formula (Google it). Just plug in the values, set the sum to 1000, and the age will be given by the next integer closest to your answer

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I don't understand