Provide an appropriate response.Factor r2n - s2n.
A. (rn - sn)(rn - sn)
B. (rn - sn)(rn + sn)
C. (r2 - s2)(rn + sn)
D. n(r - s)(r + s)
Answer: B
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Find the center of mass of a thin plate of constant density covering the given region.The region bounded by y = 6 - x and the axes
A. 
= 18, 
= 18
B. 
= 6, 
= 6
C. 
= 36, 
= 36
D. 
= 2, 
= 2
Solve the problem.The figure shown here shows a rectangle inscribed in an isosceles right triangle whose hypotenuse is 10 units long. Express the area A of the rectangle in terms of x.
A. A(x) = 2x2 B. A(x) = 2x(x - 5) C. A(x) = 2x(5 - x) D. A(x) = x(5 - x)
Find the domain and the range of the relation.{(6, 4), (-10, 4), (-3, 4)}
A. domain: {4} ; range: {-10, -3, 6} B. domain: {-10, -3, 6} ; range: {4} C. domain: {-10, -3} ; range: {4, 6} D. domain: {-10, 4, 6} ; range: {-3}
Solve the problem.The percent of concentration of a drug in the bloodstream x hours after the drug is administered is given by K(t) = 
. On what time interval is the concentration of the drug increasing?
A. (0, 4) B. (1, 4) C. (0, 5) D. (-4, 4)