Joe does a weekly exercise program consisting of cardiovascular work and weight training. Each week, he exercises for at least 8 hours. He spends at most 11 hours doing cardiovascular work. He spends at most 6 hours on wweight training. Let x denote the time in hours) that loe spends doing cardiovascular work. Let
y denote the time in hours) that he spends on weight training. Shade the region corresponding to all values of x and y that satisfy these requirements,

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 %