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
max2010maxim [7]
2 years ago
13

A city block has 6 pigeons and then 1 week later there are 9 pigeons. Let P(t)be the number of pigeons where t is measured in we

eks.
Assuming the growth continues proportionally, at the same rate, what is the differential equation which describes the growth of the pigeon population?
Mathematics
1 answer:
Pavel [41]2 years ago
8 0

Using proportions, it is found that the differential equation which describes the growth of the pigeon population is given by:

\frac{dP}{dt} = 1.5P

<h3>What is a proportion?</h3>

A proportion is a fraction of a total amount, and the measures are related using a rule of three.

In this problem, considering the initial population and the population one week later, the rate of growth is given by:

k = 9/6 = 1.5.

The standard differential equation for population growth is:

\frac{dP}{dt} = kP

Hence:

\frac{dP}{dt} = 1.5P

More can be learned about proportions at brainly.com/question/24372153

#SPJ1

You might be interested in
Refer previous problem. Suppose that you wish to estimate the difference between the mean acidity for rainfalls at two different
aivan3 [116]

Answer:

Hence,we need at least 136 rainfall PH values in the sample i.e

n ≥ 136

Step-by-step explanation:

We are given that:

(σ1)^2 = (σ2)^2 = Population variance = 0.25

So, E < 0.1

Confidence coefficient (c) = 0.9

n = n1 = n2

For confidence level, 1 - α = 0.9,we'll determine Z (α /2) = Z 0.05 by looking up 0.005 using the normal probability table which i have attached.

So, Z (α /2) = 1.645

The margin of error E is given as;

E = Z (α /2)√[(σ1)^2)/n1] + [(σ2)^2)/n2]

= Z (α /2)√({(σ1)^2 + (σ2)^2}/n) < 0.1

Multiply both sides by √n to get;

Z (α /2)√(σ1)^2 + (σ2)^2} < 0.1√n

Divide both sides by 0.1;

{Z (α /2)√(σ1)^2 + (σ2)^2}}/0.1 <√n

When we square each side, we get

{Z (α /2)√(σ1)^2 + (σ2)^2}}/0.1} ^2 < n

We'll now fill in the known values and solve;

n > ( 1.645 x √{(0.25 + 0.25)/0.1}^2

n > 135.3 or approximately n > 136

Hence,we need at least 136 observations in the sample i.e

n ≥ 136

7 0
3 years ago
Maddie does not have any pretzels. Zach gives Abbey 88 pretzels. Then he splits half of the pretzels he has left with Maddie. Za
Ann [662]
1212 x 2+ 88 = ?
Hope this helps
3 0
2 years ago
LOTS OF POINTS FOR HELLLP
lara31 [8.8K]

Answer:

y = 3x+9

Step-by-step explanation:

We can use the slope intercept form

y = mx+b

where m is the slope and b is the y intercept

y = 3x +b

Substitute the point into the equation

6 = 3(-1) +b

6 = -3+b

Add 3 to each side

6+3 = -3+3+b

9 = b

y = 3x+9

5 0
2 years ago
Read 2 more answers
CAN SOMEONE HELP ME PLEASE!
IRISSAK [1]
The screens to blurry, you can’t understand the words
5 0
3 years ago
Show your work for the last one! I kind of need this quickly :) &lt;3
pishuonlain [190]

Answer:

3. is 3 (m - 16)(m + 4)

7. is also 3. (2x + 5)(3x - 5)

12. is 4 (x - 6)(x - 4)

the last one is i dont know

5 0
2 years ago
Other questions:
  • If y=3 and 2x+4y=8 what does x equal?
    7·1 answer
  • A bag contains 100 apples, 100 bananas, 100 oranges, and 100 pears. If I pick one piece of fruit out of the bag every minute, ho
    11·1 answer
  • The rational number that expresses a loss of $25.30 is +$25.30 -$25.30 +$2.53 -$2.53 , and the rational number that represents a
    7·2 answers
  • Which of the following is a rational number?
    10·2 answers
  • A survey found that 31% of all teens buy soda (pop) at least once each week. Seven teens are randomly selected. The random varia
    13·1 answer
  • Helpppppp its a test
    14·1 answer
  • How many hours would it take the sloth to walk 1/5 mile? <br> Please do not guess!
    9·1 answer
  • Increase £14187.13 by 14.5%<br> Give your answer rounded to 2 DP.
    14·1 answer
  • You can drive 90 miles in 1/4 of a tank of gas in 1 hour.
    6·2 answers
  • PLS HELP ME !! ( WILL GIVE BRAINLIEST )
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!