Solve the problem.Suppose a cost-benefit model is given by 
, where y is the cost in thousands of dollars for removing x percent of a given pollutant. Find the cost of removing 35% to the nearest dollar.
A. $1330
B. $2046
C. $538
D. $3800
Answer: B
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Find the center of mass of a thin plate covering the given region with the given density function.The triangular region cut from the first quadrant by the line y = -x + 3, with density ?(x) = x
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Rewrite the quadratic equation in the form ax2 + bx + c = 0, then identify a, b, and c. x = -0.8x2 + 13.9
A. a = -0.8, b = 13.9, c = -1 B. a = -0.8, b = -1, c = -13.9 C. a = --0.8, b = -1, c = -13.9 D. a = -0.8, b = -1, c = 13.9
Find the product of the complex number and its conjugate.-i
A. -11
B. -
C. 
D. 11
Use the principle of mathematical induction to show that the mathematical statement is true for all natural numbers n.Sn: 10 + 20 + 30 + . . . + 10n = 5n(n + 1)
What will be an ideal response?