Which of the following circuits has an equivalent resistance of 30 ω?

The bottom left, because it is 20 + 10 = 30.

*insert ribbon > table drop-down menu* would allow you to insert a quick table

If ana decided to be against in prioritizing the task in her to do list, she will likely have insufficient time in doing the things in which she wouldn't be able to finish and in the same way, she won't be able to finish all of the task that she needed to do.