SOLUTION: A culture of yeast doubles in size every 30 minutes. The size of the culture is now No. Find its size in 1 1/2 hours. (N=No 2^t/d)

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Question 948952: A culture of yeast doubles in size every 30 minutes. The size of the culture is now No. Find its size in 1 1/2 hours. (N=No 2^t/d)
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
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Size doubles every half-hour.
, using x for hour periods.

x=2 periods, t=1 hour;
------you want this to make sense.
One hour is two periods.

Note, the N equation is initially formed using x.
Solve for x...
.

Now, rewrite the N equation using time as t.
.

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