Telephone Service The percent P of households in the United States with wireless-only telephone service from 2005 through 2014 can be approximated by the model P = − 3 .42 + 1 .297 t ln t , 5 ≤ t ≤ 14 where t represents the year, with t = 5 corresponding to 2005 . (a) Approximate the percents of households with wireless-only telephone service in 2008 and 2012 . (b) Use a graphing utility to graph the function. (c) Can the model be used to predict the percent of households with wireless-only telephone service in 2020 ? in 2030 ? Explain.
Telephone Service The percent P of households in the United States with wireless-only telephone service from 2005 through 2014 can be approximated by the model P = − 3 .42 + 1 .297 t ln t , 5 ≤ t ≤ 14 where t represents the year, with t = 5 corresponding to 2005 . (a) Approximate the percents of households with wireless-only telephone service in 2008 and 2012 . (b) Use a graphing utility to graph the function. (c) Can the model be used to predict the percent of households with wireless-only telephone service in 2020 ? in 2030 ? Explain.
Solution Summary: The author calculates the percent of households with wireless-only telephones in 2008 and 2012, based on the model P=-3.42+1.297tmathrmlnt.
Telephone Service The percent
P
of households in the United States with wireless-only telephone service from 2005 through 2014 can be approximated by the model
P =
−
3
.42 + 1
.297
t
ln
t
,
5
≤
t
≤
14
where
t
represents the year, with
t
=
5
corresponding to
2005
.
(a) Approximate the percents of households with wireless-only telephone service in
2008
and
2012
.
(b) Use a graphing utility to graph the function.
(c) Can the model be used to predict the percent of households with wireless-only telephone
A research study in the year 2009 found that there were 2760 coyotes
in a given region. The coyote population declined at a rate of 5.8%
each year.
How many fewer coyotes were there in 2024 than in 2015?
Explain in at least one sentence how you solved the problem. Show
your work. Round your answer to the nearest whole number.
Answer the following questions related to the following matrix
A =
3
³).
Explain the following terms
Chapter 5 Solutions
College Algebra Real Mathematics Real People Edition 7
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