A pole that is 2.8m tall casts a shadow that is 1.23m long. At the same time, a nearby building casts a shadow that is 37.5m lon
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The sum is 294903.
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This is the sum of 15 terms of a geometric sequence with first term 9 and common ratio 2. That sum is given by the formula
The sum is 294903.
_____
This is the sum of 15 terms of a geometric sequence with first term 9 and common ratio 2. That sum is given by the formula