Multiply.-10x(11x - 9)
A. -20x2
B. -110x2 + 90x
C. 11x2 + 90x
D. -110x2 - 9x
Answer: B
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Solve the problem.Find the equation of the tangent line to the curve x2 + y2 = 113, at the point 
A. 8x + 7y = 113 B. 7x - 8y = 15 C. 7x + 8y = 113 D. 8x - 7y = 113
Write the sum without sigma notation and evaluate it.
A. 2 cos ? + 2 cos 
+ 2 cos 
+ 2 cos 
= 3 + 
B. 2 cos ? + 2 cos 
+ 2 cos 
+ 2 cos 
= -2 + 
+ 
C. 2 cos ? + 2 cos 
+ 2 cos 
+ 2 cos 
= -1 + 
D. 2 cos ? + 2 cos 
= -2 + 
Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = ln (3x + 9y)
A. Domain: all points in the xy-plane satisfying 3x + 9y > 0; range: real numbers z ? 0; level curves: lines 
B. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
C. Domain: all points in the xy-plane satisfying 3x + 9y ? 0; range: all real numbers; level curves: lines 
D. Domain: all points in the xy-plane satisfying 3x + 9y > 0; range: all real numbers; level curves: lines 
Find the exact function value.sin-1
A. 
B. 
C. 
D. 