Use a system of equations to solve problem.Suppose that the position of a particle moving along a straight line is given by 
where t is time in seconds and a, b, and c are real numbers. If s(0) = -1, s(1) = -1, and s(2) = -11, find a, b, and c. Then find s(7).
A. a = -5, b = 5, c = -1; s(7) = -211
B. a = -5, b = -5, c = -1; s(7) = -281
C. a = 5, b = 5, c = -1; s(7) = 279
D. a = -5, b = 5, c = 1; s(7) = -209
Answer: A
Mathematics
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