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eduard
3 years ago
9

Exercice 1. Une espèces animale est menacée depuis 1950. Le nombre d’animaux, en millions, de cette espèce est donné par la fonc

tion
f(t) = 35(0.948)t
où t est le temps écoulé depuis 1950.
1. Quel est le sens de variation de la fonction f ? Justifier.
2. Calculer f(0) et f(50) (on arrondira `a 10−2 près si nécessaire)
3. Calculer le taux d’´évolution global du nombre d’animaux de cette espèce en 50 ans. S’agit-il
d’une augmentation ou d’une diminution ?
4. Calculer le taux d’évolution moyen du nombre d’animaux de cette espèce sur les 50 ans.
5. On considère qu’une espèce est en voie de disparition s’il en reste très peu de spécimen de
cette espèce (disons 1 million). A l’aide de la calculatrice, dire si cette espèce sera considérée
comme étant en voie de disparition `a partir d’une certaine année ? Si oui, quelle année ?
Mathematics
1 answer:
a_sh-v [17]3 years ago
4 0

Answer:

what?

Step-by-step explanation:

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Answer:

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We can write the equation of a line in 3 different forms including slope intercept, point-slope, and standard depending on the information we have. We have two standard form equations which we will get a slope and a y-intercept from. We will convert each to slope intercept form to get the information. We will then write a new slope-intercept equation and convert to standard form.

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3x-5y=7\\3x-3x-5y=7-3x\\-5y=7-3x\\\frac{-5y}{-5}=\frac{7-3x}{-5} \\

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y=\frac{3}{5}x+4

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For standard form we need the coefficients of x and y to be not zero or fractions. We need integers but the coefficient of x cannot be negative. So we multiply the entire equation by -5 to clear the denominators.

-5(-\frac{3}{5}x+y=4)\\3x-5y=-20



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