The figure below is a square ABCD with center O. (M, N, P, and Q are the midpoints of the sides.)
Which of the following rotations is a symmetry of the square?
A. a 60° clockwise rotation with center O
B. a 90° clockwise rotation with center A
C. a 90° clockwise rotation with center O
D. a 90° clockwise rotation with center P
E. none of these
Answer: C
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Solve the problem.Let a = 2i + 3j and b= -5j. Find 
b ? a.
A. 6
B. 
C. -15
D. -10
Determine whether the statement is true or false.The sum of zero and a positive number is always a positive number.
A. True B. False
Find the foci and vertices of the ellipse.25x2 + 4y2 = 100
A. foci at (- 
, 0) and (
, 0)
vertices at (-5, 0), (5, 0)
B. foci at (0, - 
) and (0, 
)
vertices at (0, -5), (0, 5)
C. foci at (0, -5) and (0, 5)
vertices at (0, -25), (0, 25)
D. foci at (0, 5) and (2, 0)
vertices at (0, 25) and (4, 0)
Solve.A ball is dropped from a height of 4.0 m. On each upward bounce the ball returns to 
of its previous height. Find the total vertical distance the ball travels before coming to rest.
A. 13.3 m B. 13.0 m C. 8.0 m D. 12.0 m