Solve the problem.Find the volume of the solid generated by revolving the region in the first quadrant bounded by the x-axis and the curve y = x cos x, 0 ? x ? ?/2 about the y-axis.
A. 
- 8?
B. 
- 4?
C. 
+ 2?2 - 4?
D. 
- 4?
Answer: D
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Find the derivative of y with respect to x, t, or ?, as appropriate.y = 4e?(sin ? - cos ?)
A. 4e?(sin ? - cos ?) + 4e? B. 0 C. 8e?(sin ? - cos ?) D. 8e? sin ?
Find the rate of change. Use appropriate units.
Number of Years of Use
A. -$3 thousand per year B. $4 thousand per year C. -$4 thousand per year D. $3 thousand per year
Use sum-to-product formulas to rewrite the expression as a product.sin 8x - sin 4x
A. 2 sin 2x B. 2 cos 4x cos 6x C. 2 sin 2x cos 6x D. 2 sin 6x cos 2x
For an Analysis of Variance, the larger the value of the observed/calculated F-ratio ______ .
a. the larger the sum of squares within groups compared to the sum of squares between groups b. the less likely an observed difference is due to chance c. the larger the mean square within-groups compared to the mean square between groups d. the more likely an observed difference is due to chance