Use this space for
9 On a standardized test with a normal distribution, the mean was 64.3
computations.
and the standard deviation was 5.4. What is the best approximation of
the percent of scores that fell between 61.6 and 75.1?
(1) 38.2%
(3) 68.2%
(2) 66.8%
(4) 95%
10 A wave displayed by an oscilloscope is represented by the equation
y = 3 sin x. What is the period of this function?
(1) 2π
(3) 3
(2) 2
(4) 3π
10
11 The expression
is equivalent to
3 + i
+ i
15
5
(1) 3 – i
(3)
4
5
(2) 3 + i
(4)
4
12 The accompanying tables define functions f and g.
x
x
1
2
3
4
5
3
4
5
6
7
g( x ) 4
f( x )
6
8 10 12
3
4
5
6
7
What is (g ° f )(3)?
(1) 6
(3) 8
(2) 2
(4) 4
[5]
[OVER]
Math. B – Jan. ’08