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Also.. after more thought.. 1 doesn't equal 0.9999... think about it... the working has a minor flaw.. if x = 0.999... then 10x = 9.999... well.. at the very far right hand corner of the 0.999... when its multiplied by 10 the digits need to shift to the left .. the rounding...

0.111... = 1/9 0.555... = 5/9 0.999... = 9/9 = 1 :)

Find the number of sides of a regular polygon if each interior angle is 172' How do you do a question like that? From common sense ive figured you can do it by 180(n-2) = n x angle So that would be 180n - 360 = 172n 8n = 360 so n = 45 One of my friends said the following for...

I've tried doing these but im lost.. why does sound travel faster in hydrogen than air? just checking about this one.. this is because air is less dense than hydrogen and thus sound travels faster in it right? why are high frequency sound waves preferred for tasks such as echo location...

Furthermore that doesn't include the possibility of them both not being on..

I don't think all that was necessary. Don't think gender matters in this question .. I've worked out an easy answer.. 15C5 - 13C3 = 2717 13C3 = amount of ways both are on table.. so take them off and yeah.. but i'm just looking for an alternative way to doing this question

A commuttee of 5 must be chosen from 8 boys and 7 girls. How many different committees can be formed if John will not go on the committee if Tracey is on the committe? Answer = 2717 Explain please

There are two small rows of chairs, with 3 in the front row and 4 in the second row. How can 7 people be seated if: i) 2 particular people must sit in the second row ii) Jan will not sit on the same row as Norman and Stan must sit in the first row explanation as well please? Answers...

All correct except a) which is 352/833

A poker hand of five cards is dealt from a standard pack of 52. Find the probability of obtaining a)one pair b)two pairs c)three of a kind d)four of a kind e)a full house (one pair and three of a kind) f)a straight(five cards in sequence regardless of suit) g)a flush(five cards of the...

I'm currently in year 11 but the sudden thought of scholarships came to me and scared me. So basically I have two questions.. figured this was the best place to ask.. what sort of things do you have to put down to apply for a scholarship? how much of a difference does it make on the cost...

Also "By considering its prime factorisation, find the number of positive divisors of 315000." I've got that down to 5^4 x 2^3 x 3^2 x 7.. dont get what to do from there? AND There are ten basketballers in a team. Find how many ways they can be split into two teams of five...

Jesus. I don't remember how I did even that anymore? Someone care to explain this question to me. I'm revising the stuff atm =\ Like I don't get what the hell I did there, and no one really explained that to me seeing as I understood it at the time =\

I don't get? Mind doing the example question so i can see? No restriction on the question ..

1) What do you do with a question when there is absolute values on both sides? eg |2x - 1| = |x + 5| 2) What is the answer to "Find theta correct to the nearest minute if tan theta = 1.7" Answers say only 59'32'. I thought it was 59'32' and (180+59'32') 239'32'? Is there something...

So you're saying there are a twelth arrangements for this particular case? This is confusing me =\

Yes but by going off that that is to say that... say there are 12 marbles.. all red.. how many different arrangements in a circle (12-1)! / (12!) = something less than 1.. when the obvious answer is 1.. explain this?

A sports committee consisting of four rowers, three basketballers and two cricketers sits at a circular table. a) How many different arrangements of the committee are possible if the rowers and basketballers both sit together in groups, but no rower sits next to a basketballer b) One rower...

The letters A, E, I, P, Q and R are arranged in a circle. Find the probability that: d) at least two vowels are next to one another Edit: nevermind.. figured it out

So is that a yes? It has to be on the immediate right hand side?