Complete the square and write the equation in standard form. Then give the center and radius of the circle.x2 + y2 + 6x + 4y = 3
A. (x + 3)2 + (y + 2)2 = 16
(3, 2), r = 16
B. (x + 2)2 + (y + 3)2 = 16
(2, 3), r = 16
C. (x + 3)2 + (y + 2)2 = 16
(-3, -2), r = 4
D. (x + 2)2 + (y + 3)2 = 16
(-2, -3), r = 4
Answer: C
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Find the center of mass of a thin plate covering the given region with the given density function.The region between the x-axis and the curve y = 
, 1 ? x ? 2, with density ?(x) = 
A. 
= 
, 
= 1
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Multiply and simplify.-6z ? 
A. 0 B. 36z C. 1 D. -1
Solve quadratic equation by factoring.x(x - 2) = 80
A. -8, -10 B. 8, 10 C. -8, 10 D. 8, -10
Solve the problem.Which has the lower present value: (a) $60,000 if interest is paid at a rate of 6.32% compounded continuously for 4 years or (b) $110,000 if interest is paid at a rate of 4.8% compounded continuously for 52 months?
A. (b) has the lower present value. B. (a) has the lower present value. C. Both (a) and (b) have the same present value.