Hapana, tunanunua McDonald's! :P
Wafanyakazi wamerekani wa McDonald's wanapika na sufuria ... :-P
The audio doesnt sound like a question to me, but more like a normal expression isn't it?
According to the grammatical notes given us so far, it should also be correct to translate this question as "Are the Americans cooking with (the) pots?"
Any reason why "Are the Americans cooking in pots?" is wrong. I'd talk about cooking in pots not with pots, although I do accept the construction of this sentence could imply the Americans are being cooked!
I have a hard time determining when the audio is saying a statement or asking a question. Any tips to help would be appreciated.