Factor the sum or difference of cubes.3c4 - 81c
A. 3c(c - 3)(c2 + 3c + 9)
B. 3(c + 3)(c2 - 3c + 9)
C. 3c(c + 3)(c2 - 3c + 9)
D. c(c + 3)(c2 - 3c + 9)
Answer: A
Mathematics
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A. 
B. 
C. none of these
D. 
E. 
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t = 3.8 æsec, C = 450 pF, and R = 20 Kê. Find VR in a circuit connected to a 37 V source.
a. 10.9 V b. 17.4 V c. 20.9 V d. 24.3 V e. 31.2 V
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Solve the problem.A rocket lifts off the surface of Earth with a constant acceleration of 30 m/sec2. How fast will the rocket be going 2.5 minutes later?
A. 3375 m/sec B. 4500 m/sec C. -4500 m/sec D. 2250 m/sec
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Estimate the following mentally.90 + 53 - 253 + 410
A. 700 B. 625 C. 300 D. 350
Mathematics