Section II (2 Viewers)

jln

New Member
Joined
Mar 29, 2009
Messages
1
Gender
Female
HSC
2009
i got 8pm wed. for 26and its $12.50 for 23d
nope it was 8am thursday.
you minus-ed however many hours it was, but you had to do that, ( because that would be the time the message was sent at, not recieved), anddd then go forwards 14 hours (thats how long it took to deliver the message)
therefore 8am thursday.
 

2pmhottest

New Member
Joined
Oct 5, 2009
Messages
8
Gender
Male
HSC
2009
Guys for Question 27 C GUYSMary has the better chance of winning let me explain this to youMary has 2/100 tickets which is 1/50 which is 2 percent. Jane has 1/100 + 1/100 so she also has 2 percent chanceHOWEVER the question states determine the better chacne of winning AT LEAST one PRIZEso there for mary still has a 2/100 chance of winning at least one prize and also 98/100 to LOSEJANE HOWEVER has 1/100 to win 1st raffle and 99/100 to lose the 2nd raffle is the same 1/100 to win and 99/100 to loseBUT JANE U MUST CALCULATE HER CHANCE OF WINNING AT LEAST 1 prize so it is1/100 x 99/100 + 1/100 x 99/100 WHICH EQUAL to 1.98% of her winningso therefore MARY HAS a 2 % chance of winning while jane has a 1.98 chance of WINNING AT LEAST ONE PRIZEand i am 99% sure this is the correct answer let me know what u guys think</SPAN> .............OK THERE IT IS !!!
 

wayne_d

New Member
Joined
Jun 3, 2009
Messages
28
Gender
Undisclosed
HSC
2009
Simplify 5-2(x+7)

= 5-2x-14
= -9-2x

this cannot be simplified any further, as it did not state (Find the value of x, nor did it state that (5-2(x+7)=0), therefore no value can be placed for x



I also had 8am on Thursday on the other question
 

Nivek5

Member
Joined
Dec 2, 2008
Messages
48
Gender
Male
HSC
2009
Lets just list answers to every question... make life easier

23D i ) 12.5
ii) 3$

24A) i) 78
ii) 46

SKIPING B cbf.

C) Some bs answer about data being used to located either senior or youth trends and supplying them with crap.

D) i) y = 200 - x
ii) It breaks the 120 and 150 limit (summarised)
iii)B = 4000 Profit
C = 3450 profit

B is better by $550


E) i) 1200
ii) Something to do with the function, Exponential i think never hits 0 blah blah blah


25) -9-2x acording to most people
b)2x10 ^-6 i think i got that
C) 508 M Squared
ii) 76200 times
D) i)21.6
ii) 83.85


26) i) 4
ii)75%
iii) Not sure on this one..

b)i)135+105 = 245
240/15 = 16hours ( 360 degrees = 24 hours )

cbf typing anymore
Correct me if wrong lol
 

Freshjiver

Member
Joined
Sep 10, 2008
Messages
36
Gender
Male
HSC
2009
Simplify 5-2(x+7)

= 5-2x-14
= -9-2x

this cannot be simplified any further, as it did not state (Find the value of x, nor did it state that (5-2(x+7)=0), therefore no value can be placed for x



I also had 8am on Thursday on the other question
THANKYOU. i love you; you are the voice of reason on this forum of retards.
 

zak_abc

New Member
Joined
Feb 10, 2009
Messages
2
Gender
Male
HSC
2009
Re: General Thoughts: General Mathematics

omg i do the exact same subjects as you thats heaps weird...
 

Tulii

Like the sun will rise.
Joined
Oct 15, 2008
Messages
130
Gender
Female
HSC
2009
Yeah drawing a table for the last question would have clarified it for many people.

They were not all equal out comes.. It was the DIFFERENCE.

Eg, if a 1 and a 4 were rolled the differnce would have been 3.. and so on.

You then had to add up the amount of times each number came up (from 1-5) by placing it over 36 and multipling by 18.

e.g. if the difference of 0 came up 8 times then it would be 8/36 X 18 = 4

You then had to compare it to the two experiments, experiment 2 showed the least differences. Therefore the guy was right.
 
Last edited:

blue_butterfly

New Member
Joined
Oct 16, 2009
Messages
15
Gender
Female
HSC
2009
Yeah drawing a table for the last question would have clarified it for many people.

They were not all equal out comes.. It was the DIFFERENCE.

Eg, if a 1 and a 4 were rolled the differnce would have been 3.. and so on.

You then had to add up the amount of times each number came up (from 1-5) by placing it over 36 and multipling by 18.

e.g. if the difference of 0 came up 8 times then it would be 8/36 X 18 = 4

You then had to compare it to the two experiments, experiment 2 showed the least differences. Therefore the guy was right.
Yer, thats exactly what I did!
Not sure that experiment 2 showed the least difference though. I put it for my answer but I was still so doubtful. O well, regardless I'll get marks for my working :)
 

Freshjiver

Member
Joined
Sep 10, 2008
Messages
36
Gender
Male
HSC
2009
Ok, i have a query for Question 23cii).

i) Find the area of the terrace.

...... = 13.77m2

ii) Tiles are sold in boxes. Each box holds one square metre of tiles and costs $55. When buying the tiles, 10% more tiles are needed, due to cutting and wastage.
Find the total cost of the boxes of tiles required for the terrace.

So you go 13.77 + 10/100x13.77 = 15.147m2.
So this means that they need 16 boxes, not 15, as it's more than 15 and they can't buy part of a box.

Am i correct..?
 

rowdyroddy

Member
Joined
Oct 21, 2008
Messages
269
Location
Sydney, NSW
Gender
Male
HSC
2009
Ok, i have a query for Question 23cii).

i) Find the area of the terrace.

...... = 13.77m2

ii) Tiles are sold in boxes. Each box holds one square metre of tiles and costs $55. When buying the tiles, 10% more tiles are needed, due to cutting and wastage.
Find the total cost of the boxes of tiles required for the terrace.

So you go 13.77 + 10/100x13.77 = 15.147m2.
So this means that they need 16 boxes, not 15, as it's more than 15 and they can't buy part of a box.

Am i correct..?
yes that is all correct

although i put down 16 boxes technically, i also put or 15 boxes to save some wastage.
 

JB10

Member
Joined
Sep 5, 2008
Messages
246
Location
Hurstville
Gender
Male
HSC
2009
Ok, i have a query for Question 23cii).

i) Find the area of the terrace.

...... = 13.77m2

ii) Tiles are sold in boxes. Each box holds one square metre of tiles and costs $55. When buying the tiles, 10% more tiles are needed, due to cutting and wastage.
Find the total cost of the boxes of tiles required for the terrace.

So you go 13.77 + 10/100x13.77 = 15.147m2.
So this means that they need 16 boxes, not 15, as it's more than 15 and they can't buy part of a box.

Am i correct..?
You better be! Because that's exactly what I got :)
 

Freshjiver

Member
Joined
Sep 10, 2008
Messages
36
Gender
Male
HSC
2009
Sweeeeet.

What about Question 25b):

'The mass of a sample of microbes is 50mg. There are approximately 2.5x10^6 microbes in the sample.

In scientific notation, what is the approximate mass in grams of one microbe?'

Sooo i went; 50mg / 2.5x10^6
Which gave me 1 / 50000 ; the mass of ONE microbe in mg.
Then as it said give the answer in grams ; i went 1 / 50000 divided by 1000.
Which gave me 1 / 50000000.
Which is, in scientific notation, 2x10^-8

Anyone else get this..?
 

jamesjoker

Member
Joined
Feb 18, 2008
Messages
38
Gender
Male
HSC
2009
Sweeeeet.

What about Question 25b):

'The mass of a sample of microbes is 50mg. There are approximately 2.5x10^6 microbes in the sample.

In scientific notation, what is the approximate mass in grams of one microbe?'

Sooo i went; 50mg / 2.5x10^6
Which gave me 1 / 50000 ; the mass of ONE microbe in mg.
Then as it said give the answer in grams ; i went 1 / 50000 divided by 1000.
Which gave me 1 / 50000000.
Which is, in scientific notation, 2x10^-8

Anyone else get this..?
yeh, i got that exact same answer
 

hazza9

Member
Joined
Feb 11, 2009
Messages
45
Gender
Male
HSC
2009
Sweeeeet.

What about Question 25b):

'The mass of a sample of microbes is 50mg. There are approximately 2.5x10^6 microbes in the sample.

In scientific notation, what is the approximate mass in grams of one microbe?'

Sooo i went; 50mg / 2.5x10^6
Which gave me 1 / 50000 ; the mass of ONE microbe in mg.
Then as it said give the answer in grams ; i went 1 / 50000 divided by 1000.
Which gave me 1 / 50000000.
Which is, in scientific notation, 2x10^-8

Anyone else get this..?

I got that answer as well :)
 

Users Who Are Viewing This Thread (Users: 0, Guests: 2)

Top