Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 1 - Problem Solving and Critical Thinking - Chapter 1 Test - Page 46: 15

Answer

(a) Observe the line graph that shows the year 2001 when the discharges reached its maximum. It seems to be less than 1300 in the graph. But in the year 2000, this number seems to be approximately 1250. Therefore, the estimated number, as graph reveals the fact, can be 1275. (b) Estimation is a process to guess or figure about any project or work before starting it. These are approximated answers to questions that can arise in our mind. There are several numbers of estimation methods to solve different types of computations, activities, or production. The methods can be like rounding of figures, taking help of various graphs, technology, or mathematical models, etc. Again, observe the line graph that shows the year 2010 when a number of discharges reached its minimum. It seems to be less than 300 and greater than about 250 in the graph. Therefore, the estimated number, as graph reveals the fact, can be 275. (c) From the above graph in 2001, the number of discharges reached its maximum, that is, 1275, and in the year 2002, the number of discharges was 900. So, the difference is 375. Therefore, in this period, the number of discharge decreases most rapidly. (d) From the above graph, it can be seen that in the year 1997 approximately 1000 gay service members discharged for the “don’t ask, don’t tell policy.”

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