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1

<p>N(t)= 50 * 2^t/12</p>

<p>The function above gives the number of cells, N(t), in a certain culture t minutes after an experiment began. The number of cells in the culture 1-hour after the experiment began is how many times the number of cells at the beginning of the experiment?
A. 16
B. 32
C. 60
D. 800
E. 1,600</p>

<p>I got E, and the answer is B. What I don't get is why is the startup amount of cells 50?</p>

2

<p>At the beginning, t=0, to 2^(t/12) is 1.</p>

3

<p>Adding on 1 hour = 60 minutes and 60/12 = 5. 2^5 = 32, so its 32 times larger.</p>