Please help me with this No LINKS and please explain to get brainliest and also no inappropriate answers inappropriate answer = report and do all 3 questions correctly

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)