Doubling Time Practice
Make sure the units match in all
your calculations!
1.
3...
![subject](/tpl/images/cats/mat.png)
Mathematics, 27.02.2021 05:00 kayleez31
Doubling Time Practice
Make sure the units match in all
your calculations!
1.
3. Prices are rising with a doubling time of 3
months. By what factor do prices increase in a
year?
The doubling time of a population of fruit
flies is 12 hours. By what factor does the
population increase in 36 hours? In 1
week?
The time to double is 12 hours. So after 36
hours the population increases by a factor
of 2.36/12 = 8 times as many fruit flies.
After 1 week (168 hours) = 216812 = 16,384
times as many fruit flies.
2.
The doubling time of a bank account
balance is 16 years. By what factor does it
grow in 32 years? In 96 years?
4. The number of cells in a tumor doubles every
1.5 months. If the tumor begins as a single cell,
how many cells will there be after 20 months?
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