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
Find the area of the shape shown below.<br>​
neonofarm [45]

Answer:

7

Step-by-step explanation:

First ignore the cut corner and pretend that it is just a rectangle.

The rectangle's area would be 2×4=8.

Then find out the cut corner's area.

The area of that triangle would be 1.

8-1=7 So the area of the shape is 7.

3 0
3 years ago
Read 2 more answers
Helppppppppppppppppppppp
Rashid [163]
The composition of a function and its inverse is x. So an easy approach to solve this question is to find the composition of a function with itself. If the composition results in an answer "x", then this will mean that function and its inverse are the same.

Finding the composition for 1st option:
(fof)(x) = f(f(x))= \frac{ \frac{x-1}{x+5}-1 }{ \frac{x-1}{x+5}+5 } \\  \\ &#10;= \frac{ \frac{x-1-x-5}{x+5} }{ \frac{x-1+5x+25}{x+5} } \\  \\ &#10;= \frac{-6}{6x+24} \\  \\ &#10;=    \frac{1}{x+4}

Since the composition of the function with itself is not x, the function and its inverse are not the same.

Similarly, we can find the compositions of next 3 functions with themselves. The results of compositions are listed below:

(gog)(x)=g(g(x)) = x

(hoh)(x)=h(h(x))=\frac{4x-3}{7-x}

(kok)(x)=k(k(x))= x

Thus the option 2 and 4 are the correct answers i.e. these functions are the same as their inverse functions. 
7 0
4 years ago
r. Yi buys vegetables at a market. He purchases 6 pounds of potatoes, p, and 3 pounds of onions, n, for $18. Onions cost twice a
ad-work [718]

Answer:

  • The equation 2n = p should be 2p = n.
  • The actual cost of the onions is $3.00 per pound.
  • Potatoes cost $1.50 per pound.

Step-by-step explanation:

The wording "onions cost twice as much as potatoes" is understood to mean the cost per pound of onions (n) is equal to two times the cost per pound of potatoes (2p). Then the appropriate equation would be ...

  2p = n

Then the solution is ...

  6p +3(2p) = 18

  12p = 18

  p = 18/12 = 1.50

  n = 2p = 2(1.50) = 3.00

__

The equation should be 2p = n; onions cost $3.00 per pound; potatoes cost $1.50 per pound.

5 0
3 years ago
Shane wants to buy a 3D television set. He has saved some money and is able to pay $600 as a down payment and is making monthly
Harman [31]

Answer:

the equation is

p = 600 + 150x

x is month

5 0
3 years ago
To secure a telephone pole, a steel cable will be attached to a ring on the pole 12 feet above the ground. If the cable is 15 fe
Inga [223]

Answer:

9 ft

Step-by-step explanation:

Pythagorean theorem:

x = the  square root of 15 square minus 12 square

x= square root of 225-144

x= square root of 81

X = 9

3 0
3 years ago
Other questions:
  • Mark shoots arrows at a target and hits the bull's-eye about 40% of the time. find the probability that he hits the bull's-eye o
    7·1 answer
  • Which of the following is X?
    15·1 answer
  • Find the value of x.
    12·1 answer
  • Can anyone help me with this question please
    6·1 answer
  • 10x-1/3y=15<br>solve for y​
    15·1 answer
  • What is the answer to 1/9x39
    7·2 answers
  • If question 7, how do you solve for the angles
    9·1 answer
  • Please need help on this one h as be no clue how to do this
    7·1 answer
  • Additional questions!!! Please help, due today!!!
    10·1 answer
  • The theatre has 4 chairs in a row. There are 5 rows. Using rows as your unit of measurement, what is the perimeter?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!