Find the unit tangent vector of the given curve.r(t) = 
i + 
j - 5tk
A. T = 
i + 
j - 
k
B. T = 
i + 
j - 
k
C. T = 
i + 
j - 
k
D. T = 
i + 
j - 
k
Answer: D
Mathematics
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Find the solution set for each inequality. Graph the solution set on a number line and write it in interval notation.|x| < -4
A. (-?, -4]
B. ?
C. (-?, -4) ? (4, ?)
D. (-4, 4)
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Explain why the function is not a polynomial function.f(x) = 
What will be an ideal response?
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Find the solution set of the system.
a. 
b. 
c. 
d. 
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