Question 22

The probability that an electronic device produced by a company does not function properly is equal to 0.1. If 10 devices are bought, then the probability, to the nearest thousandth, that 7 devices function properly is 

A. 0.057
B. 0.478
C. 0.001
D. 0

Question 21

The period of 2 sin x cos x is 

A. 4 pi ²
B. 2 pi
C. 4 pi
D. pi

Question 20

When a metallic ball bearing is placed inside a cylindrical container, of radius 2 cm, the height of the water, inside the container, increases by 0.6 cm. The radius, to the nearest tenth of a centimeter, of the ball bearing is 

A. 1 cm
B. 1.2 cm
C. 2 cm
D. 0.6 cm

Question 19

The period of | sin (3x) | is 

A. 2 pi
B. 2 pi / 3
C. 4 pi / 3
D. 3 pi

Question 18

If f(x) is an odd function, then | f(x) | is 

A. an odd function
B. an even function
C. neither odd nor even
D. even and odd

Question 17

The exam scores of all 500 students were recorded and it was determined that these scores were normally distributed. If Jane's score is 0.8 standard deviation above the mean, then how many, to the nearest unit, students scored above Jane? 

A. 394
B. 250
C. 400
D. 106

Question 16

The mean of a data set is equal to 10 and its standard deviation is equal to 1. If we add 5 to each data value, then the mean and standard deviation become

A. mean = 15 , standard deviation = 6
B. mean = 10 , standard deviation = 6
C. mean = 15 , standard deviation = 1
D. mean = 10 , standard deviation = 1

Question 15

Five different books (A, B, C, D and E) are to be arranged on a shelf. Books C and D are to be arranged first and second starting from the right of the shelf. The number of different orders in which books A, B and E may be arranged is 

A. 5!
B. 3!
C. 2!
D. 3! * 2!

Question 14

A school committee consists of 2 teachers and 4 students. The number of different committees that can be formed from 5 teachers and 10 students is 

A. 10
B. 15
C. 2100
D. 8

Question 13

The three solutions of the equation f(x) = 0 are - 4, 8, and 11. Therefore, the three solutions of the equation f(2 x) = 0 are

A. - 2, 4, and 11/2
B. - 8, 16 and 22
C. - 4, 8, and 11
D. 2, 19 / 2 and 7 / 2

Question 12

The three solutions of the equation f(x) = 0 are -2, 0, and 3. Therefore, the three solutions of the equation f(x - 2) = 0 are 

A. - 4, -2, and 1
B. -2, 0 and 3
C. 4, 2, and 5
D. 0, 2 and 5

Question 11

For x greater than or equal to zero and less than or equal to 2 pi, sin x and cos x are both decreasing on the intervals 

A. (0 , pi/2)
B. (pi/2 , pi)
C. (pi , 3 pi / 2)
D. (3 pi / 2 , 2 pi)

Question 10

The graphs of the two equations y = a x ² + b x + c and y = A x ²+ B x + C, such that a and A have different signs and that the quantities b ² - 4 a c and B ² - 4 A C are both negative,

A. intersect at two points
B. intersect at one point
C. do not intersect
D. none of the above

Question 9

The graphs of the two linear equations ax + by = c and bx - ay = c, where a, b and c are all not equal to zero, 

A. are parallel
B. intersect at one point
C. intersect at two points
D. perpendicular

Question 8

When a parabola represented by the equation y - 2x ² = 8 x + 5 is translated 3 units to the right and 2 units up, the new parabola has its vertex at 

A. (-5 , -1)
B. (-5 , -5)
C. (-1 , -3)
D. (-2 , -3)

Question 7

If the graph of y = f(x) is transformed into the graph of 2y - 6 = - 4 f(x - 3), point (a , b) on the graph of y = f(x) becomes point (A , B) on the graph of 2y - 6 = - 4 f(x - 3) where A and B are given by 

A. A = a - 3, B = b
B. A = a - 3, B = b
C. A = a + 3, B = -2 b
D. A = a + 3, B = -2 b +3

Question 6

f is a function such that f(x) < 0. The graph of the new function g defined by g(x) = | f(x) | is a reflection of the graph of f 

A. on the y axis
B. on the x axis
C. on the line y = x
D. on the line y = - x

Question 5

f is a quadratic function whose graph is a parabola opening upward and has a vertex on the x-axis. The graph of the new function g defined by g(x) = 2 - f(x - 5) has a range defined by the interval 

A. [ -5 , + infinity)
B. [ 2 , + infinity)
C. ( - infinity , 2]
D. ( - infinity , 0]

Question 4

The population of a country increased by an average of 2% per year from 2000 to 2003. If the population of this country was 2 000 000 on December 31, 2003, then the population of this country on January 1, 2000, to the nearest thousand would have been 

A. 1 848 000
B. 1 852 000
C. 1 000 000
D. 1 500 000

Question 3

If Log ₄ (x) = 12, then log ₂ (x / 4) is equal to 

A. 11
B. 48
C. -12
D. 22

Question 2

20 % of 2 is equal to 

A. 20
B. 4
C. 0.4
D. 0.04

Question 1

If Log_x (1 / 8) = - 3 / 2, then x is equal to 

A. - 4
B. 4
C. 1 / 4
D. 10