Petal length vs Width

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis.y = 7ex, y = 7e^-x, x = 1; about the y-axis

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units