Multiply.(7x + 9)2
A. 7x2 + 126x + 81
B. 49x2 + 126x + 81
C. 7x2 + 81
D. 49x2 + 81
Answer: B
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Solve the problem.Find the moment of inertia about the y-axis of the thin infinite region of constant density 
in the first quadrant bounded by the coordinate axes and the curve 
.
A. 
B. 
C. 
D. 
Solve the problem.Find parametric equations for the normal line to the surface 
at the point 
A. 
B. 
C. 
D. 
Use DeMorgan's Laws to rewrite the negation of the statement.The bicycle on sale comes with a free lock and a free helmet.
A. The bicycle on sale does not come with a free lock or it does not come with a free helmet. B. The bicycle on sale does not come with a free lock or it comes with a free helmet. C. The bicycle on sale comes with a free lock or a free helmet. D. The bicycle on sale does not come with a free lock and it does not come with a free helmet.
Write as a percent.0.1566
A. 0.01566% B. 15.66% C. 1.566% D. 156.6%