List the x-values in the graph at which the function is not differentiable.
A. x = -1
B. x = 0
C. x = 2
D. x = 1
Answer: B
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For the smooth curve r(t), find the parametric equations for the line that is tangent to r at the given parameter value 
r(t) = (6t2 - 6t)i + (t + 3)j + k ; t0 = 2
A. x = 18t, y = t, z = t B. x = 12 + 18t, y = 5 + t, z = 0 C. x = 12 + 18t, y = 5 + t, z = 1 D. x = 12 + t, y = t, z = t
Ten people are meeting at a conference. Each person is instructed to introduce herself or himself to each of the other participants at the conference. If it is estimated that each introduction should take 1.5 minutes, how much time should be allowed in the schedule for this activity?
What will be an ideal response?
Use an identity to find the value of the expression. Do not use a calculator.cos 46° sec 46°
A. cos2 46° B. 1 C. 46 D. 0
Write the equation for the shape described.The circle with center at (-6, -2), passing through (-3, 2)
A. (x + 2)2 + (y + 6)2 = 9 B. (x - 6)2 + (y - 2)2 = 25 C. (x - 2)2 + (y - 6)2 = 9 D. (x + 6)2 + (y + 2)2 = 25