Find the length of the indicated portion of the trajectory.r(t) = (2cos t)i + (2sin t)j + 3tk, 0 ? t ? ?/2
A. 
?
B. 
?
C. 
?
D. 
?
Answer: A
Mathematics
You might also like to view...
Solve the problem.A cylindrical water tank has height 10 m and radius 2 m (see figure). If the tank is full of water, how much work is required to pump the water to the level of the top of the tank and out of the tank? Express the answer in terms of ?. 
A. 19,600,000? J B. 627,200? J C. 1,960,000? J D. 490,000 J
Mathematics
Tell whether the angle is acute, right, obtuse, or straight.
A. Obtuse B. Right C. Acute D. Straight
Mathematics
For the given rational functions f(x) and g(x), f(x) - g(x).f(x) = 
, g(x) = 
A. 5
B. - 
C. -5
D. 
Mathematics
Simplify the expression, if possible.log5 
A. 
B. - 
C. - 
D. 
Mathematics