MA 141
Spring 2008
WA Section 1.1
1. [SCalcCC2 1.1.02.]
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The graphs of
f
and
g
are given below.
(a) State the values of
f
(4) and
g
(3).
f
(4) = 2
g
(3) = 4
(b) For what values of
x
is
f
(
x
) =
g
(
x
)?
2
(smaller value)
2
(larger value)
(c) Estimate the solution of the equation
f
(
x
) = 1.
x
=  3
(smaller value)
x
= 4
(larger value)
(d) On what interval is
f
decreasing?
[0
,4
]
(e) State the domain and range of
f
.
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Domain
[ 4
,4
]
Range
[ 2
,3
]
(f) State the domain and range of
g
.
Domain
[ 4
,3
]
Range
[0.5
,4
]
2. [SCalcCC2 1.1.18.]
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Temperature readings
T
(in °C) were recorded every two hours from midnight to 2:00 P.M. in
Cairo, Egypt, on July 21, 1999. The time
t
was measured in hours from midnight.
(a) Use the readings to sketch a rough graph of
T
as a function of
t
. (Do this on paper. Your
teacher may ask you to turn in this graph.)
(b) Use your graph to estimate the temperature at 5:00 A.M.
30.5
°C
3. [SCalcCC2 1.1.20.]
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