The dimensions of two matrices are given. Find the dimensions of the product AB and the product BA. If either is not defined, say so.A is 3 × 3; B is 3 × 3.
A. AB is 3 × 6; BA is 3 × 6.
B. AB is 1 × 1; BA is 1 × 1.
C. AB is 6 × 3; BA is 6 × 3.
D. AB is 3 × 3; BA is 3 × 3.
Answer: D
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Evaluate the integral by changing the order of integration in an appropriate way.
A. 
ln 10 (1 - cos 16)
B. 
ln 10 (1 - sin 16)
C. 
ln 10 (1 - cos 16)
D. 
ln 10 (1 - sin 16)
Identify and graph the polar equation.r = 4 sin(2?) 
A. 
rose with two petals
B. 
lemniscate
C. 
circle
D. 
rose with four petals
A game has payoff matrix A = 
. Player R uses strategy [ 0.3 0.7 ] and player C uses strategy 
. What is the expected value of the game?
A. 
[ 0.3 0.7]
B. [ 0.3 0.7] A 
C. 
A [0.3 0.7]
D. [0.3 0.7] 
E. none of these
Find the value of the indicated trigonometric function of the angle ? in the figure. Give an exact answer with a rational denominator.
Find cos ?.
A. cos ? = 
B. cos ? = 
C. cos ? = 
D. cos ? = 