Find the length of the curve.The curve r = a cos2 
, 0 ? ? ? ?, a > 0
A. 2a
B. 
C. 2?a
D. 
Answer: A
Mathematics
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Solve the problem.From a group of 3 men and 4 women, a delegation of 2 is selected at random. What is the expected number of men in the delegation?
A. 0.57 B. 1 C. 0.48 D. 0.86
Mathematics
The vectors u, v, and w are drawn below. Sketch the given vector. 
w - v
A. 
B. 
C. 
D. 
Mathematics
Tell whether the angle is acute, right, obtuse, or straight.
A. Obtuse B. Acute C. Right D. Straight
Mathematics
Find the x-intercept and y-intercept for each equation. If an intercept does not exist, say so.y = 7x
A. x-intercept: (7, 0) y-intercept: (0, -7) B. x-intercept: (0, 0) y-intercept: (0, 0) C. x-intercept: (7, 0) y-intercept: (0, 7) D. x-intercept: (-7, 0) y-intercept: (0, 7)
Mathematics