Non- cricitcal readers are concerd with recognizing what a text says/ the facts!!
Critical readers are looking for what the text says & HOW the text POTRAYS the subject (the writers views on the subject)
The least common multiple of 9 and 6 is 18 so in 18 months she will replace the bulb for the 2nd time and the air filter for the 3rd time. It will be the first time they are replaced together.
The words "and" "or" "but" are always a conjuction in any sentence.
