Simple Exponential Growth and Decay Models
Authored by Anthony Clark
Mathematics
9th Grade
CCSS covered
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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Classify the model as Exponential GROWTH or DECAY.
A=10(1.01)3
Growth
Decay
Tags
CCSS.HSF-IF.C.8B
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A population of fish starts at 8,000 and decreases by 6% per year. What is the population of fish after 10 years?
14327
4309
839
7680
Tags
CCSS.HSF-LE.A.1C
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Steve deposited
$5,000 in a savings account that pays 4% interest compounded annually. Which
equation could be used to find the value of the account after 3 years?
A = 5,000(1 + 4)3
A = 5,000(1 + 0.04)3
A = 5,000(1 + 0.4) x 3
A = 5,000(0.04)3
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The amount of ants in a colony, f, that is decaying can be modeled by f(x) = 800(.87)x, where x is the number of days since the decay started. Suppose f(20) = 49. Which of the following is true?
After 20 days, there are 49 ants in the colony.
After 49 days there are 20 ants in the colony.
The amount of ants times 20 is 49.
After 20 days the amount of ants remaining decreases by 49.
Tags
CCSS.HSF.LE.B.5
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The expression 12(1.015)t models the population of elephants in a wildlife refuge after t years since 1975.
What does the value 1.015 represent?
The number of elephants was 1,015 in 1975.
The number of elephants increases by 1.5% each year.
The number of elephants increases by 101.5% each year.
The number of elephants is multiplied by 1.015 each year.
Tags
CCSS.HSF.LE.B.5
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Is the following function exponential growth, exponential decay, linear, or none of the above.
g(x) = 740(.001)3x
Exponential growth
Exponential decay
Linear
None of the above
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.
y=5000(0.7)x
y=30(5000)x
y=5000(1.3)x
y=5000xx
Tags
CCSS.HSF.LE.A.2
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