Maths, Addmaths and Statistics: Post your doubts here!

[Asad.Babur]

Ok if it is correct to the nearest 10 then?
3990 ---> lwer bound
4010---> upper bound
Right?

LOLX! Damn not right Try yourself....... Does 3990 Rounds to 4000? Its 3995 and 4005

 

[Asad.Babur]

3995 -> LB
4005 -> UP

This just entered my mind:
10/2 = 5
4000-5 = 3995 -> LB
4000 + 5 = 4005 -> UP

A piece of wood is 12cm long to the nearest cm
1/2 = 0.5
12 - 0.5 = 11.5 -> LB
12 + 0.5 = 12.5 -> UB

LOLX! Not correct method any Way!

 

[Awesome12]

LOLX! Not correct method any Way!

It is absolutely correct. You are wrong

 

[Asad.Babur]

It is absolutely correct. You are wrong

No, from this you cannot decide weather to Put

< or <_ : P Forget it

Hows your prep :?

 

[funky brat]

How do you convert m^3 into cm^3?
For example, express 2.5m^3 into cm^3.

 

[funky brat]

Estimate each value correct to 1 sig. figure. Is its right? 48.9*0.207^2/3.94
= 50*0.2/4?

 

[funky brat]

http://papers.xtremepapers.com/CIE/...Calculator Version) (4024)/4024_s10_qp_12.pdf
Question 23, anyone?
Explain please.

 

[Asad.Babur]

How do you convert m^3 into cm^3?
For example, express 2.5m^3 into cm^3.

Its 25 000 000

 

[M.Omar]

which year was this?

Like I stated, just a random question.

 

[M.Omar]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s10_qp_12.pdf
Question 23, anyone?
Explain please.

Since Tr ABC is isosceles and AC halved is 16,the midpoint of AC extended to form a line by joining C is perpendicular.Hence,cosX=half AC/AB,cosX can be found frm the table and thus the corresponding value of AB can be determined .For b part apply the formula 1/2 a*b sinC or in other words any two adjacent lines and the angle forming in between them.Guess the adjacent lines and the corresponding angle from the figure and u can be able to figure it out.

 

[FLRNAB]

No, from this you cannot decide weather to Put

< or <_ : P Forget it

Hows your prep :?

Isn't that in graphical inequalities? Also it works so it's a correct method for solving the problem the guy had.

Estimate each value correct to 1 sig. figure. Is its right? 48.9*0.207^2/3.94
= 50*0.2/4?

That's right

How do you convert m^3 into cm^3?
For example, express 2.5m^3 into cm^3.

Its 25 000 000

1 m = 100 cm
1 m^3 = 100 * 100 * 100 cm or 10^6 cm

Converting from larger unit to smaller unit (Multiply)
2.5 x 10^6 = 25 00 000

 

[funky brat]

Thank you guys.

 

[kirann]

3995 -> LB
4005 -> UP

This just entered my mind:
10/2 = 5
4000-5 = 3995 -> LB
4000 + 5 = 4005 -> UP

A piece of wood is 12cm long to the nearest cm
1/2 = 0.5
12 - 0.5 = 11.5 -> LB
12 + 0.5 = 12.5 -> UB

ok if its like correct to the neares 100 of a cm
Then 50 is added and subtracted? Right? :|

 

[***amd***]

ok if its like correct to the neares 100 of a cm
Then 50 is added and subtracted? Right? :|

yes, u r right.

 

[kirann]

yes, u r right.

Huh thankgod
I got it
Thanks everyone who helped me out

 

[Nazuk Qureshi]

Like I stated, just a random question.

oh okay

 

[Muhammad_Hamza]

Please anyone can help me how to solve this part?

 

[Awesome12]

Please anyone can help me how to solve this part?

Substitute the values of x and y
7P + Q = 0
Q =-7 P

9 P + Q = -6
9 P - 7 P = -6
P = -3

7(-3) +Q = 0
Q = 21

 

[R.M2013]

http://papers.xtremepapers.com/CIE/...s (with coursework) (0581)/0581_w12_qp_21.pdf
can someone please help me with Q10?

 

[Awesome12]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (with coursework) (0581)/0581_w12_qp_21.pdf
can someone please help me with Q10?

In this case, we are finding the smallest no. of glasses that can be filled
Thus we take the lower bound of the bottle, and upper bound of the glasses
Lower bound of bottle = 24.5 l
Upper bound of glasses = 0.35 l

24.5/0.35
=70