Nancy is playing on a ladder and slide. the entry point of the slide is 3.0 meters above the ground and the slide is inclined at an angle of 30.0° with the horizontal. what is nancy's displacement each time she slides down from the top?

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)