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3 cards from this section. Quick, good the night before a test.
A town has 1,000 people and grows at 3% per year. What will the population be after 5 years?
Use the formula y = a(1 + r)^t.
If a tree grows at 6% annually and is currently 1.5 meters tall, how tall will it be in 4 years?
Use the growth formula with a = 1.5, r = 0.06, and t = 4.
What is the formula for exponential growth?
Remember, growth is associated with a positive rate.
In the context of decay, what does the variable 'r' represent?
It’s a percentage rate expressed in decimal form.
A culture of bacteria starts with 250 cells, doubling every 4 hours. How many cells will there be after 24 hours?
Remember, each 4 hours counts as one doubling period.
A valuable antique starts at $30,000 and depreciates by 12% after each year. How much will it be worth in 8 years?
Consider the depreciation as '1 - r' for the calculation.
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