Check my answer please and thank you

E

Eoin

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Jan 17, 2021
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16109784206211081407655736035151.jpg
I worked this out as
3cm x 2cm x 2cm = 12cm3
9cm x 2cm x 3cm = 54cm3
12cm3 + 54cm3 = 66cm3
(Am I right and didn't get the marks or am I wrong?
 
Which parts did you do deliberately incorrectly?

Feel free to have some personal confidence. Maybe find a second way to proceed and convince yourself.

I did it this way, saving the depth for last: [(3 cm * 2 cm)+ (9 cm * 3 cm)] * 2 cm = (6 cm^2 + 27 cm^2) * 2 cm = 33 cm^2 * 2 cm = 66 cm^2

"(-/2 points)" means that if you correctly respond, two points are removed?
 
tkhunny said:
Which parts did you do deliberately incorrectly?

Feel free to have some personal confidence. Maybe find a second way to proceed and convince yourself.

I did it this way, saving the depth for last: [(3 cm * 2 cm)+ (9 cm * 3 cm)] * 2 cm = (6 cm^2 + 27 cm^2) * 2 cm = 33 cm^2 * 2 cm = 66 cm^2

"(-/2 points)" means that if you correctly respond, two points are removed?
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Yes, but I feel I got it right ?
 
This is an ongoing problem. Automated scoring systems are not always perfect. If all you did was click the right radio button, there's no excuse for missing it.
 
Eoin said:
My teacher sends out 10-15 questions a week... and I didnt get marks for that answer ? mehhh
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Ask your teacher directly about the problem. If there was a scoring error, it should be able to be corrected. And if your answer had been wrong, you should be able to be told why.

(Also, this system should be able to display the answer correctly, as 66 cm3, not 66cm3. It is teaching you incorrect forms.)
 
tkhunny said:
This is an ongoing problem. Automated scoring systems are not always perfect. If all you did was click the right radio button, there's no excuse for missing it.
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I hate automatic marking... there getting paid to mark it.
 
Dr.Peterson said:
Ask your teacher directly about the problem. If there was a scoring error, it should be able to be corrected. And if your answer had been wrong, you should be able to be told why.

(Also, this system should be able to display the answer correctly, as 66 cm3, not 66cm3. It is teaching you incorrect forms.)
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No, because in the bottom left of the picture he give us 3 answers to pick from.
 
Eoin said:
No, because in the bottom left of the picture he give us 3 answers to pick from.
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And they are all written incorrectly. The 3 should be an exponent. It's a minor error (as is the question mark in the question), but I just wanted to point it out. It may just be that the technology being used makes it hard or impossible to format, but I doubt the latter.

In any case, your teacher is paid to teach, and so should be willing to answer questions even when the technology goes wrong, and especially if it is wrongly set up by the teacher. Technology can help in teaching (e.g. by doing the repetitive work of checking answers), but must be used responsibly.
 
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