Question

I got half-credit for this question on a test. Please explain to me what I did wrong. (Error analysis problem) And to the people who might report this because it was a question on a test, I got the answer partly correct, the test passed so I just want to know what I did wrong on it.

My answer to this math equation is in the image.

Answer 1

Not a answer but how did you upload two pictures at once because I can't

Answer 2

I think it’s because you didn’t multiply 340 and 10 the right way