Solve the problem.Which of the following is not a rule for data grouped by classes:1. The classes should not overlap.2. Each piece of data should belong to only one class.3. There should be no gaps between classes.4. Classes should have the same width.
What will be an ideal response?
3. There should be no gaps between classes.
Mathematics
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Find the area of the surface generated by revolving the curve about the indicated axis. y = x3/5, 0 ? x ? 2; x-axis
A. 
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B. 
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C. 
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D. 
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Mathematics
Evaluate the sum.
A. 162 B. 729 C. 19,683 D. 1080
Mathematics
Solve.A plane flying with a tailwind flew at a speed of 420 mph, relative to the ground. When flying against the tailwind, it flew at a speed of 300 mph. Express these relationships as equations. Let x represent the speed of the plane in calm air and let y represent the speed of the wind.
A. x + y = 420 y = 300 B. x + y = 300 x - y = 420 C. x + y = 300 y = 420 D. x + y = 420 x - y = 300
Mathematics
Evaluate using a graphing utility: 
A. 3,003 B. 32,760 C. 360,360 D. 75 E. undefined
Mathematics