Sketch the graph of each line by identifying the x-and y-intercepts.

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.

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

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1