Solve the problem.Find the mass of the solid in the first octant between the spheres 
and 
if the density at any point is inversely proportional to its distance from the origin.
A. 
k?
B. 40k?
C. 
k?
D. 5k?
Answer: D
Mathematics
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Find the total area of the region between the curve and the x-axis.y = -x2 + 9; 0 ? x ? 5
A. 
B. 
C. 
D. 
Mathematics
Write the set in set-builder notation.{January, February, March, April, May, June, July, August, September, October, November, December}
A. {x|x is a year} B. {x|x is a month} C. {x|x is a day of the week} D. {x|x is a week}
Mathematics
Multiply.(-0.6x4)(-0.9x5)
A. 0.54x20 B. -0.54x9 C. -0.54x20 D. 0.54x9
Mathematics
Give the rectangular coordinates for the point.(5, 150°)
A. 
B. 
C. 
D. 
Mathematics