Find the length of the curve.x = cos 2t, y = sin 2t, 0 ? t ? 2?
A. 6?
B. ?
C. 4?
D. 2?
Answer: C
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Solve the problem.Find the equation for the tangent plane to the surface 
at the point 
A. 6x - 2y - 4z = 0 B. 6x + 2y - 2z = 0 C. 6x - 2y - 4z = 6 D. 6x + 2y - 2z = 6
Solve the given trigonometric equation analytically (using identities when necessary for exact values when possible) for values of x for 0 ? x < 2?.2 cos 2x = 
A. No solution
B. 
, 
, 
, 
C. 0, 
, ?, 
D. 
, 
, 
, 
Write the equation of the graph after the indicated transformation(s). The graph of y = 
is shifted 3.5 units to the left. This graph is then vertically stretched by a factor of 5.1. Finally, the graph is reflected across the x-axis.
A. y = -5.1
B. y = 5.1
C. y = -3.5
D. y = -5.1
Solve the problem.For a school walk-a-ton, Rebecca got pledges totaling $7 per mile walked. If she walks 15,840 feet, how much money will she have collected for the walk-a-thon?
A. $110,880.00 B. $3.00 C. $63.00 D. $21.00