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I can't see what I did wrong either

how did you get 4/9?

can't be, that means there's a 686% chance of happening :P

P(A drawn first or last)= P(A drawn first but not last)+P(A drawn last but not first)=3/7*2/3+4/7*1/2=4/7

so he'd get approx $60-70 for working 3 hrs?

nine something, don't remember

how long are his shifts?

no... our pay sucks AND we don't get 1.5 or 2.5 on weekends... we get like 50 cents extra... and they're wondering why they're finding it so hard to get ppl to work on weekends and public holidays

your ranks matter more than your assessment marks.

wow 19.3.... do you still get double time or time and a half or something?

Depends on the school. Some schools would have the 4U ppl do 3U together too, others would put 4U as a different class.

I found it quite funny :)

you'd get the most reliable info by emailing the unis :)

hahahah me too after I posted 1b) and Q2 and saw that I got beaten

Q2. b) find its mass after 10 years c) find its half life (the time taken for the radium to halve its mass M=100e^-0.01t b)so at t=10, M=100 e^-0.1 kg c)1/2*100 = 50kg. 50=100 e^-0.01t 1\2=e^-0.01 t ln (1\2)=-0.01 t -100 ln (1\2)=t t=100 ln 2 years

b) how long it will take for the chlorine to reduce to 10L When A=10, 10=100e-0.0086t ln (1/10)=-0.0086t t=26.7 .: 27 mins

Q1. A chemical reaction causes the amount of chlorine to be reduced at a rate proportional to the amount of chlorine present at any one time. If the amount of chlorine is given by the formula A=Aoe^-kt, and 100mL reduces to 65L after 5 minutes, find a) the amount of chlorine after 12 minutes...

Possible throws: 1st throw: 1 (1/6 chance) 2nd throw: 2 (1/6) 3rd throw: 3 (1/6) 4th throw: 4 (1/6) 5th throw: 5 (1/6) 6th throw: anything but 6 (5/6) 1st throw: 1 (1/6 chance) 2nd throw: 2 (1/6) 3rd throw: 3 (1/6) 4th throw: 4 (1/6) 5th throw: anything but 5 (5/6) 6th throw: 6...

It says on that site to call (02) 8263 3800

2U way: P(nth throw is n on exactly 5 occasions) =1/6.1/6.1/6.1/6.1/6.5/6+1/6.1/6.1/6.1/6.5/6.1/6+1/6.1/6.1/6.5/6.1/6.1/6+1/6.1/6.5/6.1/6.1/6.1/6+1/6.1/6.5/6.1/6.1/6.1/6+1/6.5/6.1/6.1/6.1/6.1/6+5/6.1/6.1/6.1/6.1/6.5/6 =6(5/6)(1/6)5 =5/7776