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Final answer:Using the equations of motion in Physics, we can calculate the initial speed at which the fox leaves the ground and the total time the fox is in the air. For the initial speed, we use the equation, and for time, we use the equation, substituting the known values.Explanation:To solve this problem, we can apply physics principles, specifically the equations of motion. Let's denote the height that the fox jumps as 'h' which is 0.85m (85cm converted to meters) and the acceleration due to gravity as 'g', which is approximately 9.8 m/s^2. When the fox is at highest point of the leap, the velocity is zero.To calculate the initial speed 'v', we can use theequationwhere 'u' is initial velocity and 'v' is final velocity which is 0 at maximum height. Simpifying this equation gives us.After substituting the known values we can find the initial speed.To find the total time the fox is in the air, we can apply the equation. But since 'u' is 0, the equation simplifies tot = sqrt((2h)/g). After substituting the known values we can find the total time.Learn more about Physics Equations of Motion here:brainly.com/question/33851452#SPJ3...