A spotlight on the ground shines on a wall 12m away. If a man 2m tall walks from the spotlight toward the building at a speed of 2.3m/s, how fast (in m/s ) is the length of his shadow on the building decreasing when he is 4m from the building? (Round your answer the decimal place.) m/s A spotlight on the ground shines on a wall 12m away. If a man 2m tall walks from the spotlight toward the building at a speed of 2.3m/s, how fast (in m/s ) is the length of his shadow on the building decreasing when he is 4m from the building? (Round your answer the decimal place.) m/s