Convert the polar equation to a rectangular equation.r = 
A. 10x2 + 9y2 - 12x - 36 = 0
B. 8x2 + 9y2 + 12x - 36 = 0
C. 9x2 + 8y2 + 12y - 36 = 0
D. 9x2 + 9y2 + 12x - 36 = 0
Answer: B
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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?
Use the Venn diagram below to determine the probability.
P(A ? B)
A. 
B. 
C. 
D. 
Use the multiplication principle to solve the equation.- 
t = 
A. 
B. - 
C. - 
D. 
The lengths of two vectors a and b, and the angle ? between them, are given. Find the length of their cross product, |a x b|. Write the answer correct to three decimal places.
|a| = 0.12, |b| = 1.25, ? =85°