Simplify.(4p - 10pq)(4p2) - (-15p3q + 8q2) - 21
A. 16p3 - 25p3q - 8q2 - 21
B. 16p3 - 25p3q - 8q2
C. 16p3 + 25p3q - 8q2 - 21
D. 4p3 - 25p3 - 8q2 - 21
Answer: A
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Solve the problem.A spherical water tank with an inner radius of 7 m has its lowest point 1 m above the ground. It is filled by a pipe that feeds the tank at its lowest point (see figure). Neglecting the volume of the inflow pipe, how much work is required to fill the tank if it is initially empty? Express the answer in terms of ?. 
A. 
? J
B. 
? J
C. 
? J
D. 
? J
Use the fundamental identities to find the value of the trigonometric function.Find cos ?, given that tan ? = - 
and ? is in quadrant II.
A. - 
B. 
C. - 
D. 
Write a polar equation in r and ? of an ellipse with the focus at the origin, with the eccentricity  FIGURE 1.png)
and directrix x = -13.
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First, round the mixed numbers to the nearest whole number and estimate the answer. Then find the exact answer and write it in simplest form.14
- 4
A. 9
B. 9
C. 18
D. 17