Jack skateboarded for 60 minutes on Saturday, 35 minutes each on Monday and Tuesday, and 40 minutes each on Wednesday and
Sunday. Write an expression that shows the total amount of time
the spent skateboarding that week. Then evaluate the expression.

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 you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!