Two spacecraft are following paths in space given by r = (sin(r), 1.12) and r2 = (cos(t), 1 – 1,1). If the temperature for the points is given by T(x, y, z) = x²y(5- z), use the Chain Rule to determine the rate of change of the difference D in the %3D temperatures the two spacecraft experience at time t = 4. (Use decimal notation. Give your answer to two decimal places.) dD dt

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