Bobby is riding his bike down the road at a speed of 10 miles per hour. ahead of him, he sees another rider, moving in the same direction. bobby is catching up with the rider ahead of him. what is the estimated speed of the other rider? a) the same speed as bobby's. b) much faster than 10 mph. c) slower than 10 mph. d) about 5 mph.

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.

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.)

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car