Two forces 10 N and 15 N are pushed to a box. In which of the following situations would the combination of the two forces produce the greatest magnitude of the resultant? When two people push the box to the same direction.
One person pushes to the left, and other person pushes to the right.
One person pushes up, and other person pushes to the right.
One person pushes to the left, and other person pushes down.

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.)