Find the center and radius of the circle.(x - 1)2 + y2 = 1
A. (0, 1); 1
B. (-1, 0); 1
C. (1, 0); 1
D. (0, -1); 1
Answer: C
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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 
for r(t) = 2 sec2(t)i - 2 tan(t)j + 9t2k
A. v
= 8i + 4j - 
?k
B. v
= -4j + 
?k
C. v
= 8i - 4j + 
?k
D. v
= -4j - 
?k
Graph the function f(x) over the given interval. Partition the interval into 4 subintervals of equal length. Then add to your sketch the rectangles associated with the Riemann sum 
, using the indicated point in the kth subinterval for ck.f(x) = -2x - 4, [0, 2], left-hand endpoint
A. 
B. 
C. 
D. 
Write the expression in lowest terms.
A. 0 B. -m C. -1 D. 1
Solve the problem.The result of applying 12 consecutive 90° clockwise rotations with the same center is
A. a 90° clockwise rotation. B. a 90° counterclockwise rotation. C. a reflection. D. the identity motion. E. none of these