Solve the problem.Dave bought 15 packets of cookies for $31.80. Each packet of cookies contains 12 cookies. Find the cost of each cookie to the nearest tenth of a cent.
A. 17.7¢
B. 2.1¢
C. 18.8¢
D. 0.2¢
Answer: A
Mathematics
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Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the x-axis.y = 8
, y = 8
A. 
?
B. 
?
C. 
?
D. 
?
Mathematics
Solve the problem.What region in the xy-plane maximizes the value of 
?R
A. The ellipse 100x2 + 49y2 = 1
B. The ellipse 
+ 
= 1
C. The ellipse 
+ 
= 1
D. The ellipse 49x2 + 100y2 = 4900
Mathematics
Simplify the expression.sin 8x cos 4x + cos 8x sin 4x
A. sin 4x B. sin 12x C. cos 12x D. cos 4x
Mathematics
Solve. Then graph the solution.x2 - 6x - 7 ? 0
A. (-?, -1]
B. [7, ?)
C. (-?, -1] ? [7, ?)
D. [-1, 7]
Mathematics