1. ## Question help

A bacteria colony is growing at a rate of 20% per hour. If there are 10 000 bacteria now, use the compound interest formula to calculate how many there will be after 1 day. (Give your answer correct to the nearest 10 000.)

2. ## Re: Question help

$10000(1.2)^{24}$

3. ## Re: Question help

As the question says, use the compound interest formula: A = P(1+r)^n

In this case, P = 10 000, r = 20% per hour = 0.2 per hour, n = 1 day = 24 hours

Number of bacteria
= 10 000(1+0.2)^24
= 794968.472
= 790000 (to the nearest 10000)

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