A large scoreboard is suspended from the ceiling by ten strong cables. Six of the cables make an angle of 8.0° with the verticals while the other four make an angle of 100°. If the tension in each cable is 1300 N, wha is the scoreboard's mass?

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.)