epdf.pub_cbest-cliffs-test-prep13a9b242c7cb4125e6cca92d00a73d5a41681

Part V: Practice-Review-Analyze-Practice
34. D. According to the graph, the tallest “B” (before) bar is county 4.
35. E. To determine a 25% increase, find the county in which the increase in number of sightings
equals 1 ⁄4 of the original number of sightings.
increase or change
percentage change =
original number
25 % (or 1 ⁄4) =
A-
B
B
Note that merely approximating the size of the bars does not work because the bars do not
begin at 0 (they begin at 200).
36. A. Problems of distance, speed, and time can be solved using d= rt, where d is distance;
r is rate, or speed; and t is time. So
d=
rt
10 miles = 40 miles per hour (t)
t = 1 ⁄4 hour
37. B.The process of elimination will help you find the correct answer. Note that the bigger
fraction in choice A is only 2 ⁄5, or 40%. Thus, choice A is incorrect. In choice C, 1 ⁄2 is 50%
and 2 ⁄3 is 66 2 ⁄3%. Thus, choice C is incorrect. In choice D, 7 ⁄10 is 70% and 3 ⁄4 is 75%. Thus,
choice D is incorrect. And choice E is between 80% and 90%. Answer B is correct: 3 ⁄5 is
60%, and 5 ⁄6 is 83 1 ⁄3%. Thus, 68% lies between them.
38. B. Dividing the amount of commission by $6.80 will give the number of $50 sales:
$ 156.
40 = 23
$ 680 .
Thus, 23 # $ 50 = $ 1,
150 .
39. C. Since 2 ⁄3 of the students are boys, there are 2 ⁄3( 36)
= 24 boys in the class. Out of the 24
boys in the class, 3 ⁄4 are under six feet tall, or 3 ⁄4( 24)
= 18 boys under six feet tall.
40. E.
weight onVenus
weight onEarth
=
182
207
. 88%,
or approximately 90%
41. C. Dividing by a fraction is the same as multiplying by the reciprocal of the fraction (the
fraction inverted, or turned upside-down). This procedure is used in division of fraction
problems; the second fraction is inverted and then multiplied. For instance,
3
⁄4 # 2 ⁄1 = 6 ⁄4 = 3 ⁄2
Therefore, dividing by 2 ⁄4 is the same as multiplying by 4 ⁄2, or multiplying by 2.
42. A. Since 1 ⁄4 of the seniors take Physics, then 3 ⁄4 of the seniors do not take Physics.
Now multiply 3 ⁄4 times the total number of seniors (you may want to do some canceling):
315
3 1260
#
4 1
= 945
1
272