9/29/2017 m/sec --> m/sec^2 in section 9.2, example 9.2.1 (8.2.1 late
transcendentals)
10/ 3/2017 fixed up exercise 4.8.17 (4.6.17)
10/ 8/2017 Fix typo in discussion of geometric interpretation of the
sinh and cosh, "x"-->"t", section 4.11 (9.6)
10/13/2017 Fix typos in example 9.5.6 (8.5.6): x^2 --> (x-0.1)^2.
10/23/2017 In 9.7 (11.2), changed a D to -D in an integral limit.
10/24/2017 "N" -> "N-m" in the answer to exercise 9.7.14 (11.2.14)
10/27/2017 In answer to exercise 9.9.9 (11.4.9), changed incorrect signs.
10/30/2017 Change vertical axis labels on figure 9.8.1 (11.3.1)
11/10/2017 ".02" --> ".0002" in note in exercise 6.4.4.
11/26/2017 Example 11.5.2 (13.5.2), change lower limit to 1.
12/ 1/2017 Exercise 6.2.4, Change answer from negative to positive.