Find the perimeter. Use 3.14 for ? when needed.
A. 167.316 km
B. 72.67 km
C. 136.815 km
D. 56.185 km
Answer: D
Mathematics
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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 3 for r(t) = (3 - 5t2)i + (5t + 8)j - e-5tk
A. v(3) = -30i + 5j - 5e-15k B. v(3) = -30i + 5j + 5e-15k C. v(3) = 30i + 5j + 5e-15k D. v(3) = -15i +5j + 5e-15k
Mathematics
Find the magnitude of the indicated vector.If u = -2i + 7j and v = 0i + 13j, find the magnitude of v - u.
A. 2
B. 3
C. 
D. 2
Mathematics
Find the unknown number in the proportion. Write your answer as a whole number or a mixed number if possible.
= 
A. x = 7 B. x = 81 C. x = 1 D. x = 49
Mathematics
Simplify the radical expression by factoring out the largest perfect nth power. Assume that all variables are positive.
A. 3
B. -3a2b
C. 3ab
D. 3ab
Mathematics