Multiply.
x2(-7x2 + 21x + 7)
A. 3x4 + 9x3 + 3x2
B. -3x4 + 9x3 + 3x2
C. -3x4 + 18x3 + 7x2
D. 9x4 + 3x2
Answer: B
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A. - 
B. 0
C. 
D. 
Express as a single logarithm and, if possible, simplify.log5 6 - log5 z
A. log10 6/z B. log5 6/z C. log5 (6 - z) D. log5 z/6
Provide an appropriate response.The region shown here is to be revolved about the x-axis to generate a solid. Which of the methods (disk, washer, shell) could you use to find the volume of the solid? How many integrals would be required in each case? x = - y2 
What will be an ideal response?
An empty swimming pool can be filled in 12 hours. When full, the pool can be drained in 30 hours. How long will it take to fill the empty pool if the drain is left open? ? Please round the answer to the nearest hour. Enter your answer as a number without the units.
Fill in the blank(s) with the appropriate word(s).