## question 1 :

(17 x 33) / 100 = 5.61 5.61 x 7 +17 = 56.27 After 7 weeks there are nearly 56 worms.## Question 2 :

999 = 5.61*x*+ 17 999 - 17 = 5.61

*x*

*x*= 982 / 5.61

*x*= 175.04 There will be 999 worms after 175 weeks.

between the Næstved Gymnasium in Denmark and the LP2I in France

Posted in Group5.

– 2 June 2009

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The answers you gave on 1 and 2 are wrong.

1) you have to use this formula: K=K0(1+r)^n (y=b*a^x)

r is persent, and n is the number of weeks.

K=17*(1,33)^7 = 125,144

there will be 125 worms after 7 weeks.

2) We now use the same formula:

999=17*(1.33)^x

x=log(999/17)/log(1,33)

x=14,28

it will take 15 weeks to make 999 worms