The double integral gives the mass of a lamina R. Determine the density ?, the mass, and the center of mass.
A. k; 21k?; 
B. Density is proportional to distance from the origin; 21k?; 
C. k; 21k?; 
D. Density is proportional to distance from the origin; 21k?; 
Answer: B
Mathematics
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Write as an addition problem and find the sum.Susan lost 5 pounds the first week, gained 3 pounds the second week, and lost 2 pounds the third week. What was her net gain or loss?
A. 5 + -3 + 2 = 10 pounds
B. 
+ 3 + -2 = 4 pounds
C. 5 + -3 + 2 = 
pounds
D. 
+ 3 + -2 = 
pounds
Mathematics
Find the absolute value.|-0.005|
A. -0.005 B. 0.01 C. 0.005 D. 0
Mathematics
Solve.
- 
= 
A. -6 B. 20 C. 30 D. 6
Mathematics
Write each expression in factored form as an algebraic expression of a single trigonometric function.csc 2 x - 1
A. cot x B. (cot x + 1)(cot x - 1) C. csc x - 1 D. (csc x + 1)(csc x - 1)
Mathematics