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- 1. Multiple Choice
North Dakota has recently had the fastest growing population out of all 50 states. On Jan 1, 2013, the population of North Dakota was 700,000 people. North Dakota’s population has been growing by 5% per year. Express North Dakota’s population, N, in terms of years since 2013, t.
Check the BEST answer:
N=700,000(1.05)t
N=700,000(1.5)t
N=700,000(1-0.05)t
N=700,000(0.95)t
- 2. Multiple Choice
An air freshener starts with 30 grams of fluid, and the amount of fluid decreases by 12% per day. Express the amount of grams of freshener, Q, that remains, t, days after it has begun being used.
Check the BEST answer: (HINT: that means simplify what is in the parenthesis)
Q=30(1+0.12)t
Q=30(1-0.12)t
Q=30(0.88)t
Q=12(1.30)t
- 3. Multiple Choice
P = 8(1.23)t
What is the initial quantity?
8
P
t
1.23
- 4. Multiple Choice
P = 8(1.23)t
What is the growth rate?
Write as a percent!
23%
23
8
P
- 5. Multiple Choice
P = 8(1.23)t
Is the function growth or decay?
Check the box:
Growth
Decay
- 6. Multiple Choice
Q = 3.1(0.78)t
Is the function growth or decay?
Check the box:
Growth
Decay
- 7. Multiple Choice
You start an account with $500 and an interest rate of 6% compounded yearly. How much is in the account after 3 years?
Round to the nearest cent. (two decimal places)
$595.51
$600.00
$590.00
- 8. Multiple ChoiceThe population of Winnemucca, Nevada, can be modeled by P=6191(1.04)t where t is the number of years since 1990. What was the population in 1990?0 peopleIt doesn't sayI don't know6191
- 9. Multiple ChoiceWhat does the model P=A(1+r)t best represent?Exponential growthSimple InterestCompound InterestExponential Decay
- 10. Multiple Choice
Which equation matches the graph?y=2(2)xy=2(1/2)xy=2xy=1/2(2)x - 11. Multiple ChoiceWrite the equation that represents the table below:y=1/2(4)xy=2(4)xy=4(2)xy=4(1/2)x
- 12. Multiple ChoiceWhat is the y-intercept of the function?231-2
- 13. Multiple ChoiceWhat is the equation that represents the exponential function in the image below?y=3(½)xy=3(2)xy=(2)xy=2(3)x
- 14. Multiple ChoiceWhich of the following functions shows an initial amount of $15 and an increase of 35% each year?y = 15(35)xy = 15(1.35)xy = 15(0.35)xy = 35(1.15)x
- 15. Multiple ChoiceBarium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?0.25g2.5g25g80g
- 16. Multiple ChoiceIf the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?1 half-life2 half-lives3 half-lives4 half-lives
- 17. Multiple Choice
What percentage of rubidium-87 atoms will be left after four half lives?
25.0%
12.5%
6.25%
3.125%
- 18. Multiple ChoiceWhat is the half-life of iodine-131?32 days8 days16 days24 days
- 19. Multiple Choice
Solve for x.
- 20. Multiple ChoiceHow much money would need to be invested today if you want $40,000 in 18 years at 4.5% if compounded continuously.$19,923.22$17,794.32$89,916.32$1 Bob
- Answer choicesTagsAnswer choicesTags