Subtract the polynomials. Express your answer in standard form.(6x2 + 20x + 9) - (3x2 - 20x - 14)
A. 3x2 + 40x + 23
B. 66x11
C. 3x2 + 40x - 5
D. 3x2 + 23x - 5
Answer: A
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Solve the problem.Find the centroid of a hemispherical shell having outer radius 9 and inner radius 7 if the density is constant.
A. 
= 0, 
= 0, 
= 
B. 
= 0, 
= 0, 
= 
C. 
= 0, 
= 0, 
= 
D. 
= 0, 
= 0, 
= 
Provide an appropriate response.The solution set of the system y1 = 2x + 3 and y2 = -x + 9 is {(2, 7)}. Using slopes and y-intercepts, determine which of the two calculator-generated screens, left or right, is the appropriate one for this system.
A. Left B. Right C. Neither is correct. D. Both could be correct.
Simplify the expression using the order of operations. 
A. 2 B. 29 C. -3 D. 3
Follow the rules for working with measurements.A steel cylindrical tank must hold 8,500 gal of dyed water for a cloth process. Due to space constraints, the cylindrical tank is made 11 ft in diameter. How tall must the tank be? (Water weighs 8.34 lb/gal and 62.4 lb/ft 3.)
A. 47.8 ft B. 0.598 ft C. 23.9 ft D. 12 ft E. 118 ft