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maths p2

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2009scared:
maths is quite easy but i really hv a doubt in finding median from a given table..
can any1 explain me with that in detail pleasee ???

2009scared:
one more doubt june 05 p2 question 17
urgentt

astarmathsandphysics:
ah=3sin(30*0)=0
b)h=3sin(30*7)=3sin(210)=-1.5
c)The negative sign means the water is below sea level ie the tide is out

For your previous median qestion, complete a cumulative frequency colum. The class interval in which the cumulative total goes more than halfway towards the overall total is the median class.

2009scared:
Thanks a lot... :)

hyebyekadal:
hey guys can anyone help me out with the significant firgures part? or any website? in my textbook its not very clear.
and in all these tests I always mess up on the sf part. and also is ) a signifcant number? also something like 2045 to 2 sf is what? im really confused also theres something about " after the decimal place zero is  significant figure or something...so any help?
thanks in advance

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