Mathematics B Regents High School Examination Worksheet- University Of The State Of New York, 2007 Page 6
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28Use this space for
computations.
+
+
3
14 The expression
1
2
3
is equivalent to
3
3
∑
∑
-n
n
n
(1)
(3)
n =
n =
1
1
3
3
1
∑
∑
n
n
n
n
(2)
(4)
n =
=
0
n
1
15 Which set of ordered pairs does not represent a function?
(1) {(3,−2), (−2,3), (4,−1), (−1,4)}
(2) {(3,−2), (3,−4), (4,−1), (4,−3)}
(3) {(3,−2), (4,−3), (5,−4), (6,−5)}
(4) {(3,−2), (5,−2), (4,−2), (−1,−2)}
16 Cerise waters her lawn with a sprinkler that sprays water in a circular
pattern at a distance of 15 feet from the sprinkler. The sprinkler head
rotates through an angle of 300°, as shown by the shaded area in the
accompanying diagram.
Sprinkler head
What is the area of the lawn, to the nearest square foot, that receives
water from this sprinkler?
(1) 79
(3) 589
(2) 94
(4) 707
17 Which number is the discriminant of a quadratic equation whose roots
are real, unequal, and irrational?
(1) 0
(3) 7
(2) −5
(4) 4
[6]
Math. B – June ’07
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