Determine whether the improper integral is convergent or divergent, and calculate its value if it is convergent.
Convergent, 1/18
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Match the vector equation with the correct graph.
r(t) = 3i - 2j - tk; -1 ? t ? 1
A. Figure 8 B. Figure 6 C. Figure 3 D. Figure 5
Solve. To measure the spread of data, statisticians compute the sample variance of the data. For a sample of size 3, the sample variance can be computed using the expression 
where m is the mean of the three values a, b, and c. Rewrite this expression without parentheses, combining like terms.
A. 3m2 - 2am - 2bm - 2cm + a2 + b2 + c2
B. 
C. 
D. 
Use the quotient rule to simplify.
A. -27x8 B. 3x2 C. -3x2 D. -3x6
Simplify the expression. Write the result using positive exponents only.-4z-2
A. - 
B. 
C. 
D. - 