Find the direction angle ? for the given vector. Let 0° ? ? < 360° and round ? to the nearest tenth when appropriate.
A. 157.4°
B. 67.4°
C. 112.6°
D. 113.5°
Answer: C
Mathematics
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Solve the problem.Suppose that the random variables (X, Y) have joint PDF 
Find k and P(Y > 4).
A. 
; 4.22
B. 
; 0.7
C. 36; 4.22
D. 36; 0.7
Mathematics
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. No x-intercepts, no y-intercepts ;
B. No x-intercepts, no y-intercepts ;
C. No x-intercepts, no y-intercepts ;
D. No x-intercepts, no y-intercepts ;
Mathematics
Decide whether or not the matrices are inverses of each other.
and 
A. Yes B. No
Mathematics
Give the x-intercepts and y-intercepts of the graph.
A. y-intercept: 1 B. y-intercept: -1 C. x-intercept: 1 D. x-intercept: -1
Mathematics