Using a method similar to that used to calculate the consumer price index, the percentage change in the overall price level is . (Note: Use 2017 as the base year, and fix the basket at 2 karaoke machine and 6 CDs.)

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.

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83