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Question
The cells of a bacteria double in every 30 minutes. A scientist begins with a single cell. How many cells will be there after 12 hours?
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Solution
The cell of a bacteria in every 30 min = 2 ...[∵ 1 + 1 = 2 in 30 min]
So, cell of a bacteria in 1 h = 22 ...[∵ 2 + 2 in 1 h]
Cell of a bacteria in 12 h = 22 × 22 × 22 × 22 × 22 × 22 × 22 × 22 × 22 × 22 × 22 × 22 ...[∵ am × an = am + n]
= 224
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