Train A leaves the station at 5 am heading east at a rate of 80 mph. Two hours later Train B leaves the same station heading west at 40 mph. At what time will the trains be 800 miles apart?

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %