Solve the problem.Find the equation for the tangent plane to the surface 
at the point 
A. 2x + y - 11z = 1
B. 2x + y - 11z = -8
C. -8x - 6y - z = -11
D. -8x - 6y - z = -16
Answer: C
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Solve the problem.Two cars leave an intersection. One car travels north; the other east. When the car traveling north had gone 9 mi, the distance between the cars was 3 mi more than the distance traveled by the car heading east. How far had the eastbound car traveled?
A. 18 mi B. 9 mi C. 15 mi D. 12 mi
Write the number as a decimal.4.13 × 107
A. 413,000,000 B. 41,300,000 C. 289.1 D. 4,130,000
Identify the conic that the polar equation represents. Also, give the position of the directrix.r = 
A. ellipse, directrix parallel to the polar axis 
above the pole
B. ellipse, directrix perpendicular to the polar axis 
left of the pole
C. ellipse, directrix parallel to the polar axis 
below the pole
D. ellipse, directrix perpendicular to the polar axis 
right of the pole
Solve the equation.s = 128 + 8
A. {512} B. {192} C. {128} D. {256}