The position vector of a particle is r(t). Find the requested vector.The velocity at t = 
for r(t) = 4sec2(t)i - 10tan(t)j + 6t2k
A. v
= 16i - 20j + 3?k
B. v
= 16i + 20j - 3?k
C. v
= -20j - 3?k
D. v
= -20j + 3?k
Answer: A
Mathematics
You might also like to view...
Sketch D and g(D) from the description of D and change of variables 
x = u + v, y = 2u - v where D is the rectangle 0 ? u ? 1, -1 ? v ? 1
?
A.
 ? |  |
B.
 ? |  |
C. None of these.
D.
 ? |  |
Mathematics
Find the simple interest. (The rate is an annual rate unless otherwise noted. Assume 360 days in a year.)p = $4479, r = 0.05% per day, t = 6 months
A. $470.30 B. $0.45 C. $335.93 D. $403.11
Mathematics
Provide an appropriate response.Solve the formula M = S - N for S.
A. S = M + N B. S = M - N C. N = M + S D. N = M - S
Mathematics
Factor the expression completely.
?
?
A. 
B. 
C. 
D. 
Mathematics