Find the area of the trapezoid. A) 25 square units B) 35 square units C) 45 square units D) 55 square units

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.

Can someone pls ! pls answer all. no explanation needed..

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?