Find the least common denominator (LCD).
, 
A. (y - 4z)(4z + y)
B. (y - 4z)2
C. (y - 4z)(4z - y)
D. y - 4z or 4z - y
Answer: D
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Solve the problem.The radius of a right circular cone is given by the formula 
, where V is the volume and h is the height. If the volume is 552 cubic inches and the height is 13 inches, what is the radius? Use 3.14 for ?, and round your answer to the nearest tenth of an inch.
A. 0.2 in. B. 6.4 in. C. 3.7 in. D. 6.7 in.
Write the percent as a fraction or mixed number in lowest terms.62.5%
A. 
B. 
C. 
D. 
Find the indicated function.A parking lot measures 160 by 210 feet including a sidewalk of uniform width around its perimeter. Let x represent the width of the sidewalk. What is a function to represent the area of the sidewalk?
A. A(x) = x(420 + 2(2x - 160)) B. A(x) = x(3 + (160 - x)) C. A(x) = x(420 + 2(160 - 2x)) D. A(x) = x(420 + 2(160 - x))
Find the largest open interval where the function is changing as requested.Decreasing f(x) = - 
A. (3, ?) B. (-?, -3) C. (-?, 3) D. (-3, ?)