Find the center and radius of the circle.x2 - 10x + y2 - 2y + 1 = 0
A. (5, 1), r = 25
B. (5, 1), r = 5
C. (-5, -1), r = 25
D. (-5, -1), r = 5
Answer: B
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Solve the problem.A frustum of a right circular cone has a height of 10 m, a base of radius 3m, and a top of radius 2m. Find its volume.
A. 
?
B. 19?
C. 190?
D. 
?
Factor completely. If the polynomial is prime, say so.5x4y2 + 8x4y - 4x3y3
A. x3y(5xy - 8x + 4y2) B. x3y(5xy + 8x - 4y2) C. x3(5xy2 + 8xy - 4y3) D. x3(5xy - 8x - 4y2)
Solve the problem.A grocer sold 83 bags of potatoes for $1.14 each. What was the total amount of the sale?
A. $94.63 B. $94.72 C. $95.72 D. $94.62
Solve the problem.In 1990 the number of factory pollution incidents reported in Country X was 4300. This number had decreased roughly at a rate of 660 per year since 1982. (i) Find an equation of a line 
that describes this data, where y represents the number of pollution incidents during the year x. (Answers may vary.) (ii) Estimate the year when there were approximately 7740 incidents.
A. y = -660(x - 1990) + 4300; 1985 B. y = -660(x - 1982) + 4300; 1977 C. y = -4300(x - 1990) + 660; 1980 D. y = -660(x - 1988) + 4300; 1983