SM Exam 2 2009 Suggested Solutions.

[TrueTears]

for the wine glass question with the related rates, it says 6cm from the top of the wine glass.
doesnt that make it 14 cm for y? (the total height of the glass is 20 cm)
because you cant have negative values for y as the glass is being filled?

Does not matter about negative or positive values of y. All you need to do is find the respective x value for when the depth of the wine is 6 cm from the top. That occurs when y = 4.

[/0]

Hey Q13, it says 'concentration'. Your answer holds for amount, does it hold for concentration?

This is one I think I got wrong, I put C, but /0 and a few others at my school put A and they had a reasonable explanation for it. I'll get /0 to explain soon...

Uh i think if you do Q is the amount of salt in kg then





Since

[NE2000]

Wouldn't it be

You still have to consider the volume. Just do it like normal.

I put A btw tho so I'm hoping you are right

[/0]

[NE2000]

Oh yeah, my bad, I meant Q/10. Thanks for that relief

[TrueTears]

GAHHHHHHH, I have a grudge against this question! Can't believe I got it wrong fark

[almostatrap]

for 2d, since its the complex plane and it asks for points ("in cartesian form"), not coordinates, it might be asking for the actual complex numbers?

just a thought idk, i put both ways in my answer

[brenny]

for question 1f) which is a three mark question i found the time to be 20.8 which is correct but didnt read the question and forgot to find distance how many marks will i lose?

[NE2000]

for 2d, since its the complex plane and it asks for points ("in cartesian form"), not coordinates, it might be asking for the actual complex numbers?

just a thought idk, i put both ways in my answer

put both yeah same.

[TonyZ]

for question 1f) which is a three mark question i found the time to be 20.8 which is correct but didnt read the question and forgot to find distance how many marks will i lose?

same....

[GerrySly]

Farkkk what a joke, B+? God I hope so lol

[TrueTears]

for question 1f) which is a three mark question i found the time to be 20.8 which is correct but didnt read the question and forgot to find distance how many marks will i lose?

Yeap on the actual exam I had both just to be sure.

[dejan91]

Farkkk what a joke, B+? God I hope so lol

You reckon you got that GerrySly?

What would a high B+ to low A be in SS after this anyway?

[jasrulz63]

i just downloaded winrar and trying to open up the program but its going straight to photos or in jibberish :S
to assist those in my shoes, could someone please post skeleton answers? would be greatly appreciated.
also i got A for 13, if that helps

I'll put it into a PDF if TT doesn't mind?

[TrueTears]

i just downloaded winrar and trying to open up the program but its going straight to photos or in jibberish :S
to assist those in my shoes, could someone please post skeleton answers? would be greatly appreciated.
also i got A for 13, if that helps

I'll put it into a PDF if TT doesn't mind?

I'd love that! Gogo!!