Solve.s2 - 3s - 18 < 0
A. (6, ?), or {s
s > 6}
B. (-?, -3), or {s
s < -3}
C. (-3, 6), or {s
-3 < s < 6}
D. (-?, -3) ? (6, ?), or {s
s < -3 or s > 6}
Answer: C
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Use the method of successive differences to determine the next term in the sequence.9, 25, 43, 63, 85, . . .
A. 107 B. 109 C. 110 D. 111
Find the principal unit normal vector N for the curve r(t).r(t) = (t2 + 8)j + (2t - 1)k
A. N(t) = - 
j + 
k
B. N(t) = - 
j + 
k
C. N(t) = 
j - 
k
D. N(t) = 
j - 
k
Calculate. Write the answer in lowest terms and as a mixed number where appropriate.33 ÷ 2
A. 16
B. 14
C. 15
D. 13