In the vector sum a + b-c. vector aä has a magnitude of 19.9 and is directed at 21.8°counterclockwise from the positive x-direction, and vector c has a magnitude of 12.8 and is directed at 25.8°counterclockwise from the negative x-direction. what is direction of vector b. state your answer as a positive angle counterclockwise from the positive x-direction.

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Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.