Factor completely, or state that the polynomial is prime.5y4 - 25y3 + 6y2 - 30y
A. y(y - 5)(5y2 - 6)
B. prime
C. y(y + 5)(5y2 + 6)
D. y(y - 5)(5y2 + 6)
Answer: D
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Solve the problem.The following figure shows the shape and dimensions of a small dam. Assuming the water level is at the top of the dam, find the total force on the face of the dam. Round to one decimal place when appropriate. 
A. 3,266,666.7 N B. 6,533,333.3 N C. 98,000 N D. 9,800,000 N
Determine an appropriate viewing window for the given function and use it to display its graph.f(x) = x5 - x4 + x3 + 1
A. 
B. 
C. 
D. 
Use the minimum and maximum features of a graphing calculator to find approximately the intervals on which the function is increasing or decreasing. Round your values to two decimal places, if necessary.y = 
+ 
- 10
A. inc (10, ?), dec (-?, 2) B. inc (2, ?), dec (-?, 6) C. inc (-?, -2), dec (6, ?) D. inc (6, ?), dec (-?, -2)
Solve the problem.On a Touch-Tone phone, each button produces a unique sound. The sound produced is the sum of two tones, given by y = sin (2?lt) and y = sin (2?ht)where l and h are the low and high frequencies (cycles per second) shown on the illustration.
The sound produced is thus given by y = sin (2?lt) + sin (2?ht)Write the sound emitted by touching the 8 key as a product of sines and cosines.
A. y = 2 sin(2188?t) cos(484?t) B. y = 2 sin(625?t) cos(2329?t) C. y = 2 sin(484?t) cos(2188?t) D. y = 2 sin(2329?t) cos(625?t)