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Math B Regents Exam Questions by Type - Multiple Choice Page 6
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38. Battery lifetime is normally distributed for
large samples. The mean lifetime is 500 days
and the standard deviation is 61 days.
Approximately what percent of batteries have
lifetimes longer than 561 days?
[A] 68% [B] 34% [C] 84% [D] 16%
41. The accompanying graph represents the value
of a bond over time.
39. What is the domain of hx ( ) = x 2 −4x−5?
[A] { xx≥1orx≤−5}
[B] { x−1≤
x≤5}
[C] { x−5≤ x≤1 } [D] { xx≥5orx≤−1}
40. The accompanying diagram shows a child's
spin toy that is constructed from two chords
intersecting in a circle. The curved edge of
the larger shaded section is one-quarter of the
circumference of the circle, and the curved
edge of the smaller shaded section is one-fifth
of the circumference of the circle.
Which type of function does this graph best
model?
[A] trigonometric [B] logarithmic
[C] exponential [D] quadratic
42. If f ( x) = x 3 −2 x
2 , then f () i is equivalent to
[A] 2 - i [B] 2 + i [C] -2 + i [D] -2 - i
1
−
3 4 2
43. When simplified, the expression ( m )( m )
is equivalent to
[A] 3 −2
m [B] 5 −4
m
[C] 4 m 3
[D] 6 m
5
4
C r
r= 2
44. The value of ∑ 5
is
[A] 10 [B] 5 [C] 25 [D] 45
What is the measure of angle x?
[A] 40° [B] 72° [C] 108° [D] 81°
45. In the accompanying diagram, the length of
ABC is 3 π radians.
2
What is m∠ ABC?
[A] 45 [B] 36 [C] 72 [D] 53