Find the exact value of the following expression without using a calculator.cos 
A. 
B. 
C. 
D. 
Answer: C
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Find the integral.
A. 
+ C
B. 
+ C
C. 
+ C
D. 
+ C
Secret messages can be encoded by using a code and an encoding matrix. If we have the code:
and an encoding matrix E, we can encode a message by taking every two letters of the message, converting them to their corresponding numbers, creating a 2 × 1 matrix, and then multiplying each two numbers by E. The message may be unscrambled with a decoding matrix which is the inverse of the coding matrix, E-1. Determine if the given pair of encoding matrices are inverses of each
other.
and 
What will be an ideal response?
Graph the function, showing all asymptotes (those that do not correspond to an axis) as dashed lines. List the x- and y-intercepts.f(x) = 
A. x-intercept: (-2, 0) , y-intercept: (0, -1) ;
B. x-intercept: (-2, 0) , y-intercept: (0, 1) ;
C. No x-intercepts , y-intercept: (0, -1) ;
D. No x-intercepts , y-intercept: (0, -1) ; 
Solve the problem.Suppose that a game has payoff matrix 
and R plays row one 40% of the time. If C plays column two 30% of the time, what is expected value?
Fill in the blank(s) with the appropriate word(s).