Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter4: Polynomial And Rational Functions
Section4.3: Zeros Of Polynomials
Problem 64E
Related questions
Question
Transcribed Image Text:!
1
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Q
A
FI
N
200
180
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120-
C 100
80-
60
40
20
2
0
200
@
180
160
100
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120
C100
80
60
20
0 20 40 60 80 100 120 140 160 180 200 220 240
1
20 40 60 80 100 120 140 160 180 200 220 240
°F
Read It
W
S
**
X
#3
80
F3
E
D
(b) The coffee is cool enough to drink when its temperature is 130 degrees. When will the coffee be cool enough to drink? (Round your answer to two decimal places.)
min
C
$
(c) What is the temperature of the coffee in the pot? (Note: We are assuming that the coffee pot is being kept hot and is the same temperature as the cup of coffee when it was poured. Roun
your answer to the nearest degree.)
°F
4
(d) What is the temperature in the room where you are drinking the coffee? (Hint: If the coffee is left to cool a long time, it will reach room temperature. Round your answer to the nearest
degree.)
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F
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5
200
180-
160
140
120-
C 100
80
60
40
20
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0
120
C100
80
FS
60
40
20
0
T
20 40 60 80 100 120 140 160 180 200 220 240
1
20 40 60 80 100 120 140 160 180 200 220 240
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Transcribed Image Text:sc
The temperature C of a fresh cup of coffee t minutes after it is poured is given by
C=125e-0.03t+ 70 degrees Fahrenheit.
1
Q
A
(a) Make a graph of C versus t.
200
180
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140
120
C 100
80
60
40
40
20
F1
2
0
200
180
160
140
120
C100
an
80
60
60
40
n
20
0
F2
W
S
20 40 60 80 100 120 140 160 180 200 220 240
1
20 40 60 80 100 120 140 160 180 200 220 240
#3
3
80
F3
E
D
$
4
999
000
F4
R
F
O
O
25
%
200
180
160
140
120-
C 100
80
60
40
20
0
2 2 2 2 2 8 8 898
200
180
160
140
120-
C100
80
60-
40
20
20 40 60 80 100 120 140 160 180 200 220 240
20 40 60 80 100 120 140 160 180 200 220 240
1
T
G
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6
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7
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