Modeling Data The table shows the numbers of cell phone subscribers (in millions) in the United States for selected years. ( Source: CTIA-The Wireless Association ) Year 2000 2002 2004 2006 Number 109 141 182 233 Year 2008 2010 2012 2014 Number 270 296 326 355 (a) Use the regression capabilities of a graphing utility to find a mathematical model of the form y = a t 2 + b t + c for the data. In the model, y represents the number of subscribers (in millions) and t represents the year, with t = 0 corresponding to 2000. (b) Use a graphing utility to plot the data and graph the model. Compare the data with the model. (c) Use the model to predict the number of cell phone subscribers in the United States in the year 2024.
Modeling Data The table shows the numbers of cell phone subscribers (in millions) in the United States for selected years. ( Source: CTIA-The Wireless Association ) Year 2000 2002 2004 2006 Number 109 141 182 233 Year 2008 2010 2012 2014 Number 270 296 326 355 (a) Use the regression capabilities of a graphing utility to find a mathematical model of the form y = a t 2 + b t + c for the data. In the model, y represents the number of subscribers (in millions) and t represents the year, with t = 0 corresponding to 2000. (b) Use a graphing utility to plot the data and graph the model. Compare the data with the model. (c) Use the model to predict the number of cell phone subscribers in the United States in the year 2024.
Solution Summary: The author explains the mathematical model of the form y=at2+bt+c by the use of graphing utility.
The table shows the numbers of cell phone subscribers (in millions) in the United States for selected years. (Source: CTIA-The Wireless Association)
Year
2000
2002
2004
2006
Number
109
141
182
233
Year
2008
2010
2012
2014
Number
270
296
326
355
(a) Use the regression capabilities of a graphing utility to find a mathematical model of the form
y
=
a
t
2
+
b
t
+
c
for the data. In the model, y represents the number of subscribers (in millions) and t represents the year, with t = 0 corresponding to 2000.
(b) Use a graphing utility to plot the data and graph the model. Compare the data with the model.
(c) Use the model to predict the number of cell phone subscribers in the United States in the year 2024.
Robbie
Bearing Word Problems
Angles
name:
Jocelyn
date: 1/18
8K
2. A Delta airplane and an SouthWest airplane take off from an airport
at the same time. The bearing from the airport to the Delta plane is
23° and the bearing to the SouthWest plane is 152°. Two hours later
the Delta plane is 1,103 miles from the airport and the SouthWest
plane is 1,156 miles from the airport. What is the distance between the
two planes? What is the bearing from the Delta plane to the SouthWest
plane? What is the bearing to the Delta plane from the SouthWest
plane?
Delta
y
SW
Angles
ThreeFourthsMe MATH
2
Find the derivative of the function.
m(t) = -4t (6t7 - 1)6
Find the derivative of the function.
y= (8x²-6x²+3)4
Chapter P Solutions
Student Solutions Manual for Larson/Edwards' Calculus of a Single Variable, 11th
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