Maths 2 (O) - What a relief!

Creamy Goodness

this paper was too easy. why have one mediocre paper - paper 1 - and then something simpler. now i'm happy they were easy but after all the fuss of paper1 i thought they'd make paper2 the same

Africa

Deadly test ill post my results:

1Ai: 420
ii:29
Bi:2892
ii:5m

Ci: This bit confused me. Ended up with 300000pi cmcubed.
ii:28125
iii: was left with 1=r cubed, so r=1.....lol!

2a:13
bi:(-4,0)(0,3)
ii: some right angles thing above the X axis ON the y axis.
iii:4x+3y-9=0
iv:.52941?????????? WTF???
Ci:3-k/2, 6-k
ii k=3

5a: 33cm
bi:56 dgrees
ii:7
Ci:30
ii:12mins

6ai:720
ii:220
bi:25
ii:1/25
iii:1/5
iv:4/5
Ci:5040
ii:35
iii:210
iv:1/49, bu the answer is 1/42 for definite! 1/7X1/6! Wasnt sure of any in this section. Hate it, but had to do it cause didnt know the circle! Or Q4!

7a:30?
bi:8.5
ii:5.4
ci:30, 70, 60, 115, 25
ii:7.30 to 7.40
iii:7.40 to 7.50
iv:0

Did both options cause started doing 10 got to end and saw i didnt really know any of it and then did 11 got it all!!!!

10a:x4+4x3+6x2+4x+1
bi:r=2/3, 1.
bii:2/3
ci:3556
ii????'

11ai:2x+y-8=0
ii:x>=0, y>=0, 2x+y-8=0

bi:(0,160),(400,0)(0,250)(250,0)
ii:(150,100)
iii:14%

Thought it was a fine test. Anyone else get different answers herE?

Hi it's me, decimal man, again. I got 0.99 instead of 1, for that volume question. (second ball bearing part).

sarahg_angel69

rite ill put my answers up toooo:
QUESTION 1:
(a) i) 420cm squared
ii) 29cm

(b) i) 2964 m cubed
ii) 652m cubed (dats def right..did it with teacher after the exam!!)

(c) i) emmm forgot to write that on exam paper
ii) 28125
iii) o.o1m or 1cm

QUESTION 2:
(a) 13 units

(b) i) a= (-4,0) b=(0,3)
iii) 4x+3y-9=0
iv) t=0.5 or 1/2
(c)
just attempted the first part
ii)

QUESTION3:
(A) centre (0,0) radius was 7

(b) a= (2,6) b=(6,-2)

(c) i) (-4,3)
ii) (-10,3)
iii) -3 and 9

QUESTION6:
(a) i) 720
ii) 220

(b) (I) 25
(ii) 1/25
(iii) 1/5
iv) 4/5

(c) i)5040
just guessed the rest
ii) 24
iii) 210
iv) 1/42

cant remember what i wrote for part a and b for qt 7 but...
c) i) 30 70 60 115 25
ii) 7.30-7.40
iii) 7.40- 7.50
iv) 0

did vectors in the option...toooooo awkward to get those answers typed up!! was easy qt neway!!

Johnerr

for 7 part c i wrote 30 , and for quesiton 1 part c i got
can't remember but i do know i made a mistake coz i forgot to change to meters anyone else?

Africa

sarahg_angel69 wrote:

(b)ii) 652m cubed (dats def right..did it with teacher after the exam!!)

No its not. Thats something to do with volume, very different to do with the average depth! You didnt get it right im telling you that for certain, the answer is 5!

sarahg_angel69

Africa wrote:

No its not. Thats something to do with volume, very different to do with the average depth! You didnt get it right im telling you that for certain, the answer is 5!

depth is volume is is not?????????

Africa

No...depth is distance.

sarahg_angel69

we shall c who is right wen ur man john brennan releases the solutions!! u can taunt all u like if im wrong...il deservbe it!!haha

Africa

Lol im near sure. I mean depth? When they say the depth of the pool is 5m it has nothing to do with volume, understand me? I dont understand how it could be volume.....could you explain?

sarahg_angel69

i added all the diff lengths...remember u had to put 0 for the last one cuz there was no line drawn....den divided by 7.....therefore getting the mean length....
den divided 15000 by that answer...therefore gettin the average depth...

Johnerr

i'ed say john brennan is hard at work, why does he bother?

sarahg_angel69

hold on.......maybe ur right;...... im confused now...how u do it??

passive

i'm siding with Africa on this one... it was 5.

did anyone get the probability question with the horses correct:
mine had something like
210 (if he picked 3 in order)
& 343 (if he picked 3 but they didn't have to be in order)
but i was really unsure...

sarahg_angel69

Johnerr wrote:

i'ed say john brennan is hard at work, why does he bother?

cuz e fantabuluos!!! lets us no results b4 aug so we can go on the piss earlier!! whhoooo al in favour?!?!?!!?

sarahg_angel69

hey passive who asked u!?!?!?! ahahaha m nly messing...think he right too...duno were e got 5 tho???

passive

Volume = length x width x height
Therefore height (depth) = volume divided by (length by width)
ie: 15000 (or whatever it was) divided by your simpsons rule answer

Africa

for credit....lol. Fair play to him anyway...

Lol i see what you mean sarah but i am near sure that aint right! Its 15000/2892(area) which gives 5.186blahblah but rounded to 5.

sarahg_angel69

F**K

passive wrote:

Volume = length x width x height
Therefore height (depth) = volume divided by (length by width)
ie: 15000 (or whatever it was) divided by your simpsons rule answer

Johnerr

sarahg_angel69 wrote:

cuz e fantabuluos!!! lets us no results b4 aug so we can go on the piss earlier!! whhoooo al in favour?!?!?!!?

I;m not complaning, does anyone know of anyone who does this for physics??

And my simposon rule answer (probaly the easiest question on the paper) was a bit out and i divided it but thr 150000 and got 5.3 how much will i be docked for this stupidity??

colin300

as far as i remember for that depth question on 1 (b) i got 6m as i remember I cant remember how i got it but i did. If it is 5m i will go over it and see what stupid mistake i made but until the results i dont care its over.

Africa

Well assumiong you used the simpsons rule answer and divided the 50000 or whatever it was by that you will get full marks for that part, and just lose marks on the simpsons rule bit. Ah yes...the joys of a fair system...

Cotsy

Africa wrote:

iv:1/49, bu the answer is 1/42 for definite! 1/7X1/6! Wasnt sure of any in this section. Hate it, but had to do it cause didnt know the circle! Or Q4!

Thought it was a fine test. Anyone else get different answers herE?

Think the answer was 1/42+1/42=1/21 cos 1 horse can come 1st the first time but second the other and ur man still has picked the winners. I Think!

Africa

hm........ possibly. Didnt think of that. Not sure as i said....