The value of the Conference Board Index of 10 economic indicators in the United States could be approximated by the following function of time t in months since the end of December 2002. 8(t)= fo.se 150 -0.2r 160.5 (a) Estimate E(9), E(18), and (20) 8(9) - (18) - (20) pret your answers Select (9) means in (18) means in of the year year (20) means in (b) Sketch the graph of E. Use your graph to estimate when the index first reached 153. t 8(1) -- (c) Use technology to generate a table of values for E() with t-6, 7, 20. (C) Posts 15 ir 15
The value of the Conference Board Index of 10 economic indicators in the United States could be approximated by the following function of time t in months since the end of December 2002. 8(t)= fo.se 150 -0.2r 160.5 (a) Estimate E(9), E(18), and (20) 8(9) - (18) - (20) pret your answers Select (9) means in (18) means in of the year year (20) means in (b) Sketch the graph of E. Use your graph to estimate when the index first reached 153. t 8(1) -- (c) Use technology to generate a table of values for E() with t-6, 7, 20. (C) Posts 15 ir 15
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:The value of the Conference Board Index of 10 economic indicators in the United States could be approximated by the following function of time in months since the end of December 2002.
Jo.se + 150
fosts 15
-0.21 160.5 i 15 <ts 20.
(a) Estimate E(9), E(18), and E(20)
E(9) -
(18)
(20)
Interpret your answers
(9) means in
Select
(18) means in
E(20) means in
8(t)-
of the year
Set
of the year
beect
of the year
(b) Sketch the graph of E. Use your graph to estimate when the index first reached 153.
t
(c) Use technology to generate a table of values for E(t) with t-6, 7, 20.
8(t)
t
E(E)
t
E(1)
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6
11
16
Bo
7
12
17
8
the Conference Board Index was
the Conference Board Index was
the Conference Board Index was
13
18
9
14
19
10
15
20
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