Perform the indicated operation.v = -4i + 6j + 3k and w = 6i - 2j + 3kFind 3v + 4w.
A. 12i + 10j + 21k
B. 2i + 4j + 6k
C. 20i - 2j + 15k
D. -6i + 16j + 12k
Answer: A
Mathematics
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Solve the problem.The current I, in amperes, flowing through a particular ac (alternating current) circuit at time t seconds is I = 110 sin (40?t)What is the period and amplitude of the current?
A. period = 
second, amplitude = 120
B. period = 40? seconds, amplitude = 
C. period = 
second, amplitude = 40
D. period = 
second, amplitude = 110
Mathematics
Use the multiplication property of equality to solve the equation.
= -2
A. -10 B. 10 C. 7 D. -7
Mathematics
Evaluate the expression by hand.64-4/3
A. 
B. 16,384
C. 1024
D. 
Mathematics
In using the trapezoidal rule, the number of subintervals n must be even. ?
A. false B. true
Mathematics