M
ATH
115 –F
IRST
M
IDTERM
February 10, 2009
N
AME
:
I
NSTRUCTOR
:
S
ECTION
N
UMBER
:
1.
Do not open this exam until you are told to begin.
2. This exam has 10 pages including this cover. There are
??
questions.
3. Do not separate the pages of the exam. If any pages do become separated, write your name on them and
point them out to your instructor when you turn in the exam.
4. Please read the instructions for each individual exercise carefully. One of the skills being tested on this
exam is your ability to interpret questions, so instructors will not answer questions about exam problems
during the exam.
5. Show an appropriate amount of work for each exercise so that the graders can see not only the answer but
also how you obtained it. Include units in your answers where appropriate.
6. You may use your calculator. You are also allowed two sides of a 3 by 5 notecard.
7. If you use graphs or tables to obtain an answer, be certain to provide an explanation and sketch of the
graph to show how you arrived at your solution.
8. Please turn off all cell phones and pagers and remove all headphones.
P
ROBLEM
P
OINTS
S
CORE
1
9
2
16
3
13
4
10
5
14
6
11
7
7
8
8
9
12
T
OTAL
100
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2
1. Air pressure,
P
, decreases exponentially with the height,
h
, in meters above sea level. The unit
of air pressure is called an
atmosphere
; at sea level, the air pressure is 1 atm.
(a) (5 points) On top of Mount McKinley, at a height of 6198 meters above sea level, the air
pressure is approximately 0.48 atm. Use this to determine the air pressure 12 km above sea
level, the maximum cruising altitude of a commercial jet.
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 Winter '09
 NA
 Math, Calculus, Derivative, consultant, Awkward Turtle

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