Find the length of the parametric curve defined over the given interval.x = 3 sin3 t, y = 3 cos3 t, 0 ? t ? ?
A. 6
B. 18
C. 3
D. 9
Answer: D
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Calculate the direction of 
and the midpoint of line segment P1P2. P1(6, -8, -1) and P2(9, -12, -6)
A. 
i - 
j - 1
k; 
B. 
i - 
j - 
k; 
C. 
i - 
j - 
k; 
D. 
i - 
j - 1
k; 
In order to prepare her budget, Sue gathers receipts for all major expenses she has had over the last month. Round the figure to the nearest dollar.Groceries, $582.09
A. $581 B. $582.10 C. $582 D. $583
Solve the problem.Jill is 16 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill walks at 2.5 km/hr. They meet in 4 hours. How fast is Joe walking?
A. 6.5 km/hr B. 1.5 km/hr C. 2 km/hr D. 6 km/hr
Solve the problem.The printed matter on a 12-cm by 24-cm page of a book must cover 160 cm2. If all margins are to be the same width, how wide should they be?
A. 3 cm B. 2 cm C. 1 cm D. 4 cm