What's is the converse of the statement?

if x is odd, then 2x is even.

a) if x is not odd, then 2x is not even
b) if x is odd, then 2x is even
c) if 2x is even, then x is odd
d) if 2x is not even, then x is not odd

You are measuring the dimensions of the floor in your bedroom because you are planning to buy new carpet. which unit of measure is the most appropriate to use in this situation?

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..