Write the standard form of the equation of the circle whose radius is r and whose center is (h, k).r = 
; (h, k) = (0, 0)
A. x2 + y2 = 
B. x2 + y2 = 13
C. x2 + y2 = 169
D. x2 + y2 = 
Answer: B
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Solve the problem.The base of a rectangular tank measures 6 ft by 12 ft. The tank is 19 ft tall, and its top is 10 ft below ground level. The tank is full of water weighing 62.4 lb/ft3. How much work does it take to empty the tank by pumping the water to ground level? Give your answer to the nearest ft ? lb.
A. 810,950 ft ? lb B. 3,286,483 ft ? lb C. 1,664,582 ft ? lb D. 811,140 ft ? lb
Find the product of the given binomial and its conjugate.
+ 
A. 4
B. 4
C. 4 - 2
D. 8
Find the degree and leading coefficient of the polynomial.15 + 5x - 18x2 + 6x3 + 3x4
A. Degree: 15; leading coefficient: 3 B. Degree: 4; leading coefficient: 3 C. Degree: 4; leading coefficient: 15 D. Degree: 3; leading coefficient: 6
An expression that occurs in calculus is given. Factor completely.2(x + 6)(x - 5)3 + (x + 6)2 ? 6(x - 5)2
A. 2(x + 5)(x - 6)2(4x + 13) B. 2(x + 6)(x - 5)2(4x + 13) C. (x + 6)(x - 5)2(8x + 26) D. (x + 6)(x - 5)2(4x + 13)