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# Problem A spacecraft moves along a path described by the parametric equations x = 10 ( 1 + t 4 1 ) , y = 40 t 3 2 for the first 100 sec after launch....

for the first 100 sec after launch. Here, x and y are measured in meters, and t is measured in seconds. Find the magnitude and direction of both the velocity and the resultant acceleration of the spacecraft 18 seconds after launch. Round answers to one decimal place.