Chem/Phys Section Bank Question 5- error in explanation?

[somedudehere]

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I got the question right but was confused as how they arrived at the second value in the explanation.

For the first value I did 1.5 x 5 for a value of 7.5 which was one of the answer choices and the correct answer

For the second value wouldn't it be 2.2 x 2 for a value of 4.4 instead of 2.4 which is what is stated in the explanation?

 

[To be MD]

It looks like you're right unless there's some external factor here beyond the scope of their explanation (unlikely).

Someone, somewhere just made an error, and since it doesn't effect any of the answer choices, it was overlooked.