Factor the binomial completely.4a3 - 81a
A. a(2a + 9)(2a - 9)
B. (2a2 + 9)(2a - 9)
C. a(2a - 9)2
D. a(4a + 1)(a - 81)
Answer: A
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The displacement d (in meters) of an object at time t (in seconds) is given. Describe the motion of the object. What is the maximum displacement from its resting position, the time required for one oscillation, and the frequency?d = -8 sin 
A. simple harmonic; -8 m; 4 sec; 
oscillation/sec
B. simple harmonic; 8 m; 
sec; 4 oscillations/sec
C. simple harmonic; 8 m; 2 sec; 
oscillation/sec
D. simple harmonic; 8 m; 4 sec; 
oscillation/sec
Provide an appropriate response.If you graphed x ? -10, would you use a parenthesis or a square bracket? Explain why.
What will be an ideal response?
Two planes take off at the same time from an airport. The first plane is flying at 244 miles per hour on a course of 135.0°. The second plane is flying in the direction 170.0° at 358 miles per hour. Assuming there are no wind currents blowing, how far apart are they after 2 hours? ? Apply the rules regarding the use of significant digits after all computations are complete. ? __________ mi
Fill in the blank(s) with the appropriate word(s).
Multiply, then simplify the product. If variables are present, assume they are positive.(2
+ 
)(2
- 
)
A. 4x - 2
- y
B. 4x - y
C. 4x2 - y2
D. 4x + y