Find the angle between vectors v and w. Round the answer to the nearest tenth of a degree.v = 
, w = 
A. 18°
B. 72°
C. 61.6°
D. 28.4°
Answer: A
Mathematics
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Calculate the work done by the force F along the path C.F = ti + 
j + k ; C: r(t) = e4ti + e4tj + (7t2 + t)k , -1 ? t ? 1
A. W = e4 + e-4 + 16 B. W = 2 C. W = 16 D. W = e4 + e-4 + 2
Mathematics
Solve the equation. If the solutions involve square roots, give both the exact solutions and the approximate solutions to three decimal places.
- 
= 
A. -3 B. 6 C. 3 D. No solution
Mathematics
Identify the number as real, complex, pure imaginary, or nonreal complex. More than one of these descriptions may apply.?
A. Complex B. Nonreal complex C. Complex, pure imaginary, nonreal complex D. Real, complex
Mathematics
Simplify.(x-4y4)-1
A. 
B. 
C. 
D. 
Mathematics