# Bacteria can divide in every 20 minutes.so 1 bacterium can multiply to 2 in 20minutes.4 in 40 minutes and so on.how many bacteria will there be in 6 hours? Write answer using exponents and then evaluate

$Itisgiventhatafterevery20minutes1bacteriadividesinto2.\phantom{\rule{0ex}{0ex}}ie,2in20minutes,4\left(={2}^{2}\right)in40minutes,8\left(={2}^{3}\right)in60minutesetc.\phantom{\rule{0ex}{0ex}}So,in1hourbacteriawilldivides3times\phantom{\rule{0ex}{0ex}}andin6hoursbacteriawilldivides6\times 3=18times\phantom{\rule{0ex}{0ex}}So,bacteriaafter6hourswillbe{2}^{18}.$

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