All categories

2 years ago

Need help asap, will mark brainliest, thanks!

Mathematics

1 answer:

Licemer1 [7]2 years ago

6 0

Answer:

in year 7

Step-by-step explanation:

$\frac{2520000}{4000000} = .63$

$.63 \times 2520000 = 1587600$

$4000000( {.63}^{x} ) = 200000$

${.63}^{x} = .05$

$x = 6.48$

So in year 7, the animal would be placed on the endangered species list.

You might be interested in

The population of a community is known to increase at a rate proportional to the number of people present at time t. The initial

qaws [65]

Answer:

Step-by-step explanation:

Let P be the population of the community

So the population of a community increase at a rate proportional to the number of people present at a time

That is

$\frac{dp}{dt} \propto p\\\\\frac{dp}{dt} =kp\\\\ [k \texttt {is constant}]\\\\\frac{dp}{dt} -kp =0$

Solve this equation we get

$p(t)=p_0e^{kt}---(1)$

where p is the present population

p₀ is the initial population

If the initial population as doubled in 5 years

that is time t = 5 years

We get

$2p_o=p_oe^{5k}\\\\e^{5k}=2$

Apply In on both side to get

$Ine^{5k}=In2\\\\5k=In2\\\\k=\frac{In2}{5} \\\\\therefore k=\frac{In2}{5}$

Substitute $k=\frac{In2}{5}$ in $p(t)=p_oe^{kt}$ to get

$\large \boxed {p(t)=p_oe^{\frac{In2}{5}t }}$

Given that population of a community is 9000 at 3 years

substitute t = 3 in ${p(t)=p_oe^{\frac{In2}{5}t }}$

$p(3)=p_oe^{3 (\frac{In2}{5}) }\\\\9000=p_oe^{3 (\frac{In2}{5}) }\\\\p_o=\frac{9000}{e^{3(\frac{In2}{5} )}} \\\\=5937.8$

<h3>Therefore, the initial population is 5937.8</h3>

7 0

3 years ago

The owner of a flower shop sells 18 roses for $90. What is the cost in dollars per rose

Lorico [155]

90/18=5. Hope this helps

3 0

4 years ago

Read 2 more answers

Help Me! ASAP! What is the solution of the system of equations? Type your answers in the blanks.

myrzilka [38]

Answer:

0.5 or 1/2...........................

8 0

3 years ago

Read 2 more answers

I am a quadrilateral with opposite sides congruent; all angles are right and opposite sides are parallel.

d1i1m1o1n [39]

It is a rectangle.

It can be a parallelogram but in this case it isn’t. A parallelogram may include all these details but not all parallelograms have all right angles. However, a rectangle is both a parallelogram and has all right angles. Therefore, rectangle is the best answer.

7 0

3 years ago

24 - c/12 = -89 what is x

VLD [36.1K]

Answer:

−

1356

−

1356

Step-by-step explanation:

5 0

3 years ago