Find different polar coordinates (r, ?) for the same point under the given conditions.
, r < 0 and 2? < ? < 4?
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = 5 sin t - cos tFind the body's jerk at time t = ?/4 sec.
A. - 2
m/sec3
B. 3
m/sec3
C. - 3
m/sec3
D. 2
m/sec3
Mathematics
Solve the problem.When a ball is thrown upward at a speed of 22 m/s, its height h above the ground (in meters) after t seconds is given by the algebraic expression 
Find the height of the ball after 3 seconds.
A. 51.3 m B. 61.1 m C. 21.9 m D. 36.6 m
Mathematics
Sketch the graph of the function.y = -1 - 2 cos 2x
A. 
B. 
C. 
D. 
Mathematics
Solve the equation.-7(9 + x) = -21
A. {-30} B. {-12} C. {-6} D. {12}
Mathematics