A garden in City B. It took her four hours to travel 216 miles over the mountain road. She came home on the highway. On the highway she tool three hours to travel 192 miles. How fast did she travel using the mountain route? How much faster (in miles per hour) did she travel using the highway route?
On the mountain road she traveled miles per hour.

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 %