Advanced MathHardPercent growth over two years of an exponential model
Advanced Math practice question
The number of members of a club t years from now is modelled by M(t) = 500(1.2)ᵗ. By what percent does the model say the membership will grow over the next 2 years?
Answer: 44
1.2² = 1.44, a 44% increase.
Common wrong answers
- If you answered 20
- 20 is one year's growth.
- If you answered 40
- 40 doubles the yearly rate, ignoring compounding.
- If you answered 144
- 144 is the new size as a percent of the old, not the growth.
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