Find the limit, if it exists.
A. Does not exist
B. 6
C. -6
D. 0
Answer: A
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A particle moves with position function r(t) = 5 costi + 5 sintj + 5tk. Find the normal component of the acceleration vector.
What will be an ideal response?
Find all the complex roots. Leave your answers in polar form with the argument in degrees.The complex fifth roots of 
+ i
A. 
(cos 30° + i sin 30°), 
(cos 102° + i sin 102°), 
(cos 174° + i sin 174°), 
(cos 246° + i sin 246°), 
B. 32(cos 30° + i sin 30°), 32(cos 102° + i sin 102°), 32(cos 174° + i sin 174°), 32(cos 246° + i sin 246°), 
C. 32(cos 6° + i sin 6°), 32(cos 78° + i sin 78°), 32(cos 150° + i sin 150°), 32(cos 222° + i sin 222°), 
D. 
(cos 6° + i sin 6°), 
(cos 78° + i sin 78°), 
(cos 150° + i sin 150°), 
(cos 222° + i sin 222°), 
Solve the problem.A projectile is fired with an initial velocity of 450 feet per second at an angle of 70° with the horizontal. In how many seconds will the projectile reach its maximum altitude? (Round your answer to the nearest tenth of a second.) The parametric equations for the path of the projectile are x = (450 cos 70°)t, and y = (450 sin 70°)t - 16t2.
A. 21.3 sec B. 18 sec C. 9.8 sec D. 13.2 sec
Determine whether the proportion is true or false by writing the ratios in lowest terms.
= 
A. True B. False