answer two

There is +1 for the years and approximatly +17 for the people.
 The best equation is 17x+y.
 There will be 5670 people in Denmark in 2020.
Posted in Group7.
– 2 June 2009
Re exercise of geometry
Hello guys, it's a new version of the exercise of geometry. We hope that it will be more clear. If you need some helps, make a comments. Take a lead pencil and draw the figure described below : Firstly draw an equilateral triangle ABC, the sides have a length of 10cm. Draw the height of [AB]. Extend the height, it must be a line. The instersection of the height and [AB)is H. The height is also called (HC). Then do all the bisectors of the triangle. Draw a circle which has as center the intersection of the bisectors. The circle is called F, with a radius of 2cm. After, draw another circle, F', with C as center and for radius [HC]. F' cut (HC) to the point N. Now draw a new circle F'' with the same diameter that F and with N as center. Finally you must erase the bisectors and F'. You have finish. Congratulate. Question bonus : Now try to find what this figure represent. An indication, we are 37 hours in. Good luck!=D
Posted in Group5.
– 2 June 2009
answer exercise math
Calculate X : tan 25° = x/1000
x = tan25° * 1000
x = 466 meters
Calculate Y : tan 55° = Y/1000
y = tan55°*1000
y = 1428 meters
Calculate Z = 1428466
z = 962 meters
The plane traveled 962 meters in 20s.
Posted in Group7.
– 2 June 2009
Linear Functions
Hello this is the exercice of math about linears functions
1)Witch is the function G(x)
g(x)=3x+5
g(x)=4x+7

find with the calculus if C[3;5] is in g(x)

Dress the variation's table of f(x) and g(x)
4)If x=2 find f(x) with f(x)=x^{3}2x²+4
5)is h a linear function h(2)=4 and h(3)=6 Find the expression of h:
Posted in Group2.
– 2 June 2009
CHEMESTRY EXERCISE
You are a chairman of a gas and water company.
1) For your products, you have to find lewis' representation of the water and te butanol (it's a gas) ?
2) You have 1kg of water and 2kg of butanol. How mol of water and buanol have you got
3) You have find he bilan equation of a concurent company but the equation in not complete. Complete this equation : C3H8+.......O2>.........CO2+......H2O
Posted in Group8.
– 2 June 2009
Chemistry exercise
A man had stolen the recipe of a magic potion. He can read :
In a flask of 250 ml, put 6*102 mol of sodium hydroxide. Then add 7 mol of water and 1,6*102 mol of glucose powder and finally three drops of methylene blue.
Obstruct the flask and shake the solution.
Transform the recipe with adapts units
Posted in Group7.
– 2 June 2009
Math exercise 2
ABCD is a rectangle trapeze with AB=6; CD=2 and AD=4.
M is a point on [AD] and AM=x.
AMNP is a rectangleas N is a point on [BC] and H is the orthogonal projection of C on (AB).
1) Give the interval that belong to x.
2) Prove that the triangle CHB is isocele rectangle in H.
Prove that PB = x.
Posted in Group7.
– 2 June 2009
An exercise of geometry
Welcome in France !
Make an isoscele triangle ABC in A.
AB = 8 cm and BC = 6 cm > The base is down.
Find the midpoint N of the base.
Make a semicircle whose the centre is N. The radius of the semicircle is 2 cm.
Be careful : the semicircle is inside of the isoscele triangle.
The two intersections of the semicircle with the base are called O and P.
Draw the mediator of ABC.
Draw a perpendeicular line (d) to [AN]. The length between A and this line is 4,5 cm.
Draw an another perpendicular (f) line to [AN] but this time, the length between A and this line is 3 cm.
The intersections of (f) and [AB] and [AC] are called R and S.
The intersections of (d) and [AB] and [AC] are called T and U.
The intersection of (f) and [AN] is called K.
The intersection of (d) and [AN] is called J.
Make a circle C whose the centre is J with a radius of 1,3 cm
Make a circle C' whose the centre is K with a radius of 1 cm
The intersections of C and (d) are called W and X
The intersections of C' and (f) are called Z and Y.
Draw the lines segments [YW] and [ZX]. You must have the trapezium WXYZ.
Erase the line segment [OP].
Erase the line segment [TW].
Erase the line segment [XU].
Erase the line segment [RZ].
Erase the line segment [SY].
Erase the circles C and C'.
Now you must guess which famous and French monument is it ?
Posted in Group9.
– 2 June 2009
Math exercise 2
Hello !
It's the second exercise of maths :
Thibault breed Merin, a young fighter dragon. He want him to have an armour and gave all of his measures to the armourer. But, some of them was erased.
Here is what stay :
Total length : 15m
Length of the head : 3m
Length of a leg : 1,5m
Waistline : 6,28m
Surface of the body : 31,4m²
Surface of the tail : 23,4m²
Breadth of the body :
Length of the body :
Surface of a rectangle : 1,5m²
Breadth of a rectangle of wing :
Length of a wing :
Breadth of a wing :
Surface of a wing :
Wingspan :
Each wing is composed by 3 equals rectangles. The body and the tail are cylinders.
Posted in Group3.
– 2 June 2009
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