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course MTH 173
0007 2FEB2013
Text section 1.1 •Section 1.1 Problems 1-4, 6, 10, 12, 23, 17, 22, 24, 27, 31, 32, 36, 37, 39, 40, 43
1. f(35) = 12 means that 35 years after 1970 the population is 12 million.
2. We would have a graph with the heart rate on the y axis and time on the right. Out line will drop rapidly from time 0 to a lower heart rate then slowly rise as time moves to the right.
3. It says that productivity increases at a decreasing rate to a point until the ideal number of workers are achieved, then the productivity decreases at an increasing rate after that.
4. y = 1x
6. y = ˝(x) + 2
10. y = ˝(x) + 2
12. a) V, b) IV , c) I, d) VI, e) II, f) III
17. y = -5x + 11
22. Domain is (-2, 2) Range is (-2, 2)
23. Domain is (1, 5) Range is (1, 6)
24. Domain is (-inf, inf) Range is (2, inf)
27. The domain cannot be either -1 or 0 but can be all other values. Domain is (-inf, -1] [-1,0] [0, inf)
31. E = v^3
32. N = l/(l^2)
36. a) 2.5 cents
b) Bill = ft^3(.025) + 15
c) 3,400 ft^3 will lead to a bill of $100
37. a) f(30) = 10 means that the temperature of the object is 10 degrees C after 30 minutes.
b) The vertical intercept of “a” is the initial time at which the object is placed outside. The “b” intercept indicates the time at which the temperature of the object is zero degrees C.
39. s = 133000000 - 904000(t)
If the model is accurate, sperm count will be below 20 million in the year 2042.
40. a) Slope is 1.8 or 9/5
b) y = 1.8x + 32
c) 68 degrees C
d) -40 is the same for F and C.
43. The graph would have distance on the y axis and time on the x axis. If distance is marked at 0 and 120 miles a line would start at the 120 mile mark on the y axis and decrease at a constant rate to 0 along the x axis, the point at which we come to Kalamazoo.
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You were asked to complete the qa and query documents, which will guide you in the process of putting your answers into the desired format.
You have done this for Assignment 1.
There is no need to submit an additional list of answers to the text questions.
Basically I don't check answers, I check solutions. Your book already supplies you with answers to odd-numbered problems.
It would be unreasonable to ask you to type out solutions to all the assigned problems
The Query and qa sample your thinking in a way that allows me to monitor your progress and provide help when that is necessary.
However having worked those questions and submitted the qa and Query, you are always invited to submit a Submit Question Form on any problem or problems on which you want my feedback.
All that said, I recognize most of these questions and the answers you have given here look very good overall.
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