Solve the problem.At time t ? 0, the velocity of a body moving along the s-axis is 
When is the body moving backward?
A. t > 6
B. 0 ? t < 1
C. 0 ? t < 6
D. 1 < t < 6
Answer: D
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Use implicit differentiation to find the specified derivative at the given point.Find 
at the point (1, 3, 2) for 
+ 
+ 
= 0.
A. - 
B. 
C. - 
D. 
Solve the problem.A pulsed electric voltage, V, is defined by
Find ao (if it is not zero), two nonzero cosine terms (if they exist), and two nonzero sine terms (if they exist) of the Fourier series for the time-dependent voltage.
A. V(t) = 
- 
B. V(t) = 
- 
C. V(t) = 
- 
D. V(t) = 
- 
The abacus in the figure has "five" playing the role of "ten." (a) What number is represented on this five-bead abacus? (b) How would this number naturally be recorded?
A. (a) 67, (b) 232 B. (a) 335, (b) 2320 C. (a) 62, (b) 132 D. (a) 37, (b) 72
Solve the differential equation.
= 6x
A. y = 3 sin-1 (3x2 + C) B. y = sin (3x2 + C) C. y = 3 sin (3x2 + C) D. y = sin-1 (3x2 + C)