The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 
for r(t) = (10 sin 3t)i - (3 cos 3t)j + (10 csc 3t)k
A. a
= 90i + 90k
B. a
= -90i + 90k
C. a
= -90i - 90k
D. a
= 27j + 90k
Answer: B
Mathematics
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Write the number in scientific notation.0.0000000234012
A. 2.34012 × 108 B. 2.34012 × 10-7 C. 2.34012 × 10-9 D. 2.34012 × 10-8
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Solve the inequality. Express your answer using interval notation.-6(5x - 12) < -36x + 30
A. (-7, ?)
B. (-?, -17]
C. (-?, -7]
D. (-?, -7)
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Multiply and simplify.
? 
A. 5m
B. 
C. 
D. 10
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