Factor completely, if possible.x4 - 16
A. (x2 - 4)(x + 2)(x - 2)
B. (x2 + 4)(x + 2)(x - 2)
C. Prime
D. (x + 2)2(x - 2)2
Answer: B
Mathematics
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A. 8 B. 125 C. 243 D. 15
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Solve the problem.For an electrical circuit, the voltage E is modeled by E = 2.7cos 38? t, where t is the time in seconds. How many cycles are completed in one second?
A. 19 cycles B. 38? cycles C. 2.7 cycles D. 38 cycles
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Solve the problem.The following table shows the number of dog collars, in thousands, produced by Allied Pet Products in the three years considered. For a function of the form f(x) = ax2 + bx + c that fits this data, what is the value of c? 
A. 14 B. 20 C. 12.8 D. 23.6
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Prove the identity.
?
What will be an ideal response?
Mathematics