แผ่นงานExponential Growth and Decay Word Problems Practice
คำถามทั้งหมด: 15
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
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
P = 8(1.23)t
What is the initial quantity?
(a)
P = 8(1.23)t
Is the function growth or decay?
Check the box:
Growth
Decay
Q = 3.1(0.78)t
What is the initial quantity?
(a)
Q = 3.1(0.78)t
Is the function growth or decay?
Check the box:
Growth
Decay
From 2000 - 2010 a city had a 2.5% annual decrease in population. If the city had 2,950,000 people in 2000, determine the city’s population in 2008.
Round to the nearest (a) (these are people)... so whole number!
You buy a car for $8000 that depreciates at a rate of 11% a year. How much is the car worth after 5 years?
Round to the nearest cent. (two decimal places)
(a)
Middletown High School has student elections every year. Lately, the school has seen a 5% decrease in voting from election to election. If 910 students voted this year, how many will be expected to vote 8 years from now? (Round to the nearest whole number if necessary).
604
777
29
198
More and more people are purchasing food from farmers' markets. As a consequence, a market researcher predicts that the number of farmers' markets will increase by 15% each year. If there are 6,200 farmers' markets this year, how many will there be in 10 years? (Round to the nearest whole number if necessary).
25,082
12,937
62,000
43,511
A publishing industry report predicts that magazine subscriptions will drop by 10% each year. If this prediction is correct, then how many subscribers will a magazine with 98,000 subscribers have in 10 years? (Round to the nearest whole number if necessary).
34,170
16,348
7690
76,023
A cliff overlooking Oak Grove Lake is experiencing erosion, losing elevation at a rate of 5% every millennium. The cliff's current elevation is 1,200 meters. What will its elevation be in 6 millennia? (Round to the nearest whole number if necessary).
882
465
349
975
Thanks to its environmental initiatives, Silvergrove has cut its annual CO2 emissions by 5%. This year, the town produced 290,000 metric tons of emissions. If the downward trend continues, how much CO2 will be produced 7 years from now? (Round to the nearest whole number if necessary).
202,518
135,792
78,376
20,658
The mice population is 25,000 and is decreasing by 20% each year. What will be the mice population after 3 years?
12,800
15,777
102, 475
2,500
Your new computer cost $1500 but it depreciates in value by about 18% each year. How much will your computer be worth in 6 years? (Round to the nearest cent.)
$456.01
$556.98
$778.22
$332.63
แป้นคำตอบExponential Growth and Decay Word Problems Practice
คำถามทั้งหมด: 15
N=700,000(1.05)t
Q=30(0.88)t
Growth
Decay
604
25,082
34,170
882
202,518
12,800
$456.01