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Which point is a solution to the inequality shown in this graph (-3,-3)(3,-1)

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

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