Find the zeros of f(x), given that one zero is k.f(x) = x3 + 4x2 - 5x - 20
k = -4
A. -
, ±5
B. -
, ±
C. -4, ±5
D. -4, ±
Answer: D
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Find the center of mass of a thin plate covering the given region with the given density function.The triangular region cut from the first quadrant by the line y = -x + 1, with density ?(x) = x
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Determine if the sequence is decreasing or nondecreasing and if it is bounded or unbounded from above.an = ln
A. Decreasing; unbounded B. Decreasing; bounded C. Nondecreasing; unbounded D. Nondecreasing; bounded
Find the net cost. Round to the nearest cent.$872 less 10/10/20/30
A. $802.00 B. $261.60 C. $436.00 D. $395.54
Solve the problem.Peter must practice the piano 
per week. He has already practiced 
How many more hours does he need to practice?
A. 7
hr
B. 1
hr
C. 6
hr
D. 1
hr