Multiple Choice Identify the
choice that best completes the statement or answers the question.


1.

If , , and , which product is
not possible?
a.  M ´ M  c.  N ´ M  b.  M ´
N  d.  N ´ P 


2.

If , , which is the matrix that represents
B ´ A?


3.

Which statement about matrices T and Q is true? and
a.  The product T ´ Q is a 4 ´ 1 matrix.  b.  The product Q ´ T is a 1 ´ 4
matrix.  c.  The product Q ´ Q is a 2 ´ 1 matrix.  d.  The products T ´ Q, Q ´ T , and Q
´ Q do not exist. 


4.

The Office Store sells two models of desk lamps. Matrix R shows the
number of lamps of each model sold at the store during the first four months of 2004, while matrix
S gives the price for each model. For which month did the store
have the greatest total sales from these desk lamps?
a.  January  c.  March  b.  February  d.  April 


5.

Matrix P shows the 2004 admission prices to Mount Vernon, George
Washington’s home. Matrix A gives the number of admissions in each of the four age
categories sold during two months last year. What was the total
sales from admission tickets for July?
a.  $896,300  c.  $361,850  b.  $534,450  d.  $354,260 
