A particle's velocity is described by the function vx=kt2m/svx=kt2m/s, where vxvx is in m/sm/s, tt is in ss, and kk is a constant. The particle's position at t0=0st0=0s is x0x0x_0 = -7.60 mm . At t1t1t_1 = 2.00 ss , the particle is at x1x1x_1 = 5.20 mm .   Determine the units of k in terms of m and s

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