1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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:

You might be interested in
What is 3:7 put in to lowest forms?
Artemon [7]
3/7 is in simplest form, because they are both prime numbers and have no factors.
4 0
3 years ago
Jenny is taking a vacation from Florida. She travels 70 kilometers per hour for 2 hours, and 63 kilometers per hour for 5 hours.
crimeas [40]

Answer: 65 kmh

Step-by-step explanation:

70 kmh for 2 hours = 140 km.

63 kmh for 5 hours = 315 km

140 + 315 = 455/7 total hours = 65 kmh

3 0
3 years ago
Can anyone pls help with this ASAP!!! :((
MrRissso [65]

Answer: I believe your answer is C.

7 0
2 years ago
Read 2 more answers
After releasing of radioactive material into.The atnosphere from.A nuclear.Powe plant in a country in 1988, the hay in that coun
Radda [10]

Answer:

the question is incomplete, so I looked for a similar one:

<em>After the release of radioactive material into the atmosphere  from a nuclear power plant, the hay was contaminated by iodine  131 ( half-life, 8 days). If it is all right to feed the hay to cows  when 10% of the iodine 131 remains, how long did the farmers  need to wait to use this hay? </em>

iodine's half life (we are given x, we need to find b):

0.5A₀ = A₀eᵇˣ

x = 8 days

we eliminate A₀ from both sides

0.5 = eᵇ⁸

ln 0.5 = ln eᵇ⁸

-0.69315 = b8

b = -0.69315 / 8 = -0.08664

since the farmers need to wait until only 10% of the iodine remains (we already calculated b, now we need to find x):

0.1A₀ = A₀eᵇˣ

0.1 = eᵇˣ

ln 0.1 = bx

where b = -0.08664

x = ln 0.1 / -0.08664  = -2.302585 / -0.08664  = 26.58 days

4 0
2 years ago
If the angle of a sector measures 60°, what fraction of the circle is the sector?
maks197457 [2]

The angle of the sector is also equal to the arc measure of the circle. This is because a sector is made up of two radii of a circle.

A circle is 360 degrees.

60 / 360 = 1/6

The sector is 1/6 of the circle.

Hope this helps!! :)

6 0
2 years ago
Other questions:
  • How do I solve this step by step?
    10·1 answer
  • When converting 3.68 the denominator will be
    9·2 answers
  • 2x(x-4)=12 in standard form
    5·1 answer
  • If dave runs 1.8 kilometers in 15 minutes , what is his average rate
    7·1 answer
  • carlos made up a game where, in a deck of cards, the red cards (hearts and diamonds) are negative and the black cards (spades an
    15·2 answers
  • In a group of 25 girls, 8 ran for the cross country team, 13 are on the math league team, and 6 are on both teams. How many of t
    12·1 answer
  • I need help with finding the percent. Please help me with this
    13·2 answers
  • What is 5x²+x³-2x+1 ?​
    10·1 answer
  • A $125.70 grocery total is discounted 30%. What is the total paid?
    5·1 answer
  • - 1/5(y-x) please help on this !!!!
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!