Algebra: Not quite... Geometry: Correct! It was suppose to be a hinge theorem problem but now I see that it does give some weird answers... Calculus: Correct!

Yes D was the intended answer.

Actually you did get the algebra question correct the first time it is C. The calculus question is A. Nicely done!

Geometry: Correct Algebra: Not quite... Calculus: Not quite... the cube will not have a length of 4.2 after applying the coating think about the the cube extruding on the sides as you apply the coating.

Yes

Nicely done it seems that you knew what you were doing.

I guess you can. If you want to try your luck.

The problems reads: If the area formed by the positions of the two people in their starting point (the right angle) is changing at 5 m^2/s. So when the two persons are 4 meters from the right angle the

"In the third question, are the two walkers moving at a constant speed?" Yes, they are walking at a constant speed.

Correct the first is B.

Correct the second one is A.

Great problems like the way you increased the level of difficulty from one problem to the next.

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