137 sp08 exam 1 rev ans 1 MA 137 Exam One Review Problems—ANSWERS 1. a. True b. True c. False, in fact, RSR=∩ d. True 2. Is A a subset of B? No. For example, 0 is not an element of B. Is B a subset of A? No. For example, 15 is not an element of A. {0,5,10,15, 20}AB=∪ {5,10, 20}AB=∩ 3. PB′∩ is the set of Purdue students that are not Indiana residents. 4. Number of unit squares Long-flats Flats Longs Units 48 0 1 4 3 268 2 0 3 3 215 1 3 3 0 5. I’ve omitted the sketches, but I’m giving the number of total units for each. a. 342five = 97 total units b. 1122three = 44 total units c. 602eight = 386 total units 6. I’ve omitted the sketches, but I’m giving the numeral in correct base notation. a. 2030six b. 316twelve c. 1212seven 7. To report 19 items as “103,” Robin must be in base four. Then “103” would be one flat (with 16 total units) and three units. 8. The regions that should be shaded are those containing an *: a. ()ABC∩∪ A B C * * *137 sp08 exam 1 rev ans 2 b. ()ACB∪∩ c. ( )BAC′′∩∩ d. (This one is harder than anything I’d put on an exam) (( ) ) (( ) )ACB BCA′′∩∩ ∪ ∩∩ 9. 13 10. A B C * * * A B C * A B C * * A B C a w i o h s n g t137 sp08 exam 1 rev ans 3 11. See the back of the textbook 12. See the back of the textbook 13. a. 5 b. 7 c. 12 Slayter Hill John Purdue’s Grave Hort Park 6 3 4 5 7 5 8
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