Chapter 9 Review Questions
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Transcript of Chapter 9 Review Questions
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Chapter 9 Review Questions
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Gasoline costs $2.79 per gallon. If the price per gallon increases an average of 3% per month, how much will the price
of gas per gallon be in a year?
$3.98
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In 1990, the cost of tuition at a state university was $4300. During the next 8 years, the tuition
rose 4% each year. Suppose you have a child that graduates from high school in the year
2030. How much could you expect to pay for their college tuition?
$20,644.39
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A. Constant Increase
B. Constant Decrease
C. Exponential Growth
D. Exponential Decay
x
xk
3118.1)(
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Suppose your uncle left you $10,000 in his will for graduate school. You put it in an account that pays 6% annual yield. How much interest will
you have earned in six years?
$4,185.19
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A new television costs $1200. The value of the television decreases by 21% each year. Estimate
the value of the television after 2 years.
$748.92
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A. Constant Increase
B. Constant Decrease
C. Exponential Growth
D. Exponential Decay
xxf 08.134.0)(
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A diamond ring was purchased 20 years ago for $500. The value of the ring
increased by 8% each year. What is the value of the ring today?
$2,330.48
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A. Constant Increase
B. Constant Decrease
C. Exponential Growth
D. Exponential Decay
xxg 76.0032.0)(
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Suppose 12 deer are introduced to a 100 acre forest preserve. If the deer population doubles every year, how many deer with there be on the
preserve after 15 years?
196608
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An airplane is flying at an altitude of 30,000 ft. The pilot is instructed to decrease the planes
altitude by 10% each minute. What will be the planes altitude in 15 minutes?
≈6,176 ft
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A. Constant Increase
B. Constant Decrease
C. Exponential Growth
D. Exponential Decay
xxm 285)(
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1n 1991, there were a reported 28.5 thousand cases of tuberculosis reported in the U.S.
Reports indicate that the number of cases is supposed to decline by 4.33% each year. Predict
how many cases will be reported in 2008.
≈13.4 thousand
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There are 40,000 homes in your city. Each year 10% of the homes are expected to disconnect their land lines and use their cell phones for
means of communication. How many homes will still have land lines in 15 year?
≈8,235
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A new car costs $23,000. The value decreases by 15% each year. Estimate the value of the car
after 3 years.
$14,124.88
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The high school enrollment in a rural community is currently 300 students and is
decreasing by 5% a year. How many student will there be in the school in 10 years?
≈179
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In 2000, the average price of a football ticket for a Minnesota Vikings game was $48.28. During
the next 4 years, the price increased an average of 6% each year. How much will the average
price of a ticket be in the year 2015?
$115.71
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A. Constant Increase
B. Constant Decrease
C. Exponential Growth
D. Exponential Decay
5.41.3)( xxv
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A. Constant Increase
B. Constant Decrease
C. Exponential Growth
D. Exponential Decay
3.32110)( xxr
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A. Constant Increase
B. Constant Decrease
C. Exponential Growth
D. Exponential Decay
10134)( xxr
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A. Constant Increase
B. Constant Decrease
C. Exponential Growth
D. Exponential Decay
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