1. Which of the following is an example of like terms?
a. - 16 and - 16x
b. x and x2
C, 50y and y
d. 20a and 2

Find the length of cu, the triangles are similar.

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.

Ineed with number 6 , explain how to get 1978