What is the formula to calculate the mechanical advantage of a lever

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

What object a collides with object b and bounces back its final momentum is?

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.)