Solve the problem.The position of a particle moving along a coordinate line is s = 
, with s in meters and t in seconds. Find the particle's velocity at 
A. 
m/sec
B. 3 m/sec
C. 
m/sec
D. - 
m/sec
Answer: C
Mathematics
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Multiply. Simplify the answer completely.30 ? 
? 
A. 18
B. 
C. 
D. 1
Mathematics
Evaluate the expression.(-7)2
A. -14 B. -49 C. 14 D. 49
Mathematics
Find possible value(s) of ? in the interval [0°, 360°) with the given trigonometric function value.cos ? = 
A. 45°; 225° B. 30°; 330° C. 135°; 225° D. 225°; 315°
Mathematics
For the given equation, find the vertex or vertices.r = 
A. 
B. 
, 
C. 
D. 
, 
Mathematics