When should you use the undo command?

When creating a budget, log fixed expenses before income. after income. after savings. at the top.

The head restraint should be adjusted so that it reaches a.the top of your ears b.the base of your skull c.the top of the head

An npn transistor is correctly biased and turned on if the a. base is negative. b. collector is negative. c. collector is positive with respect to the emitter and negative with respect to the base. d. collector is the most positive lead followed by the base.