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
Kamila [148]
3 years ago
14

Please help me with this

Mathematics
2 answers:
nikklg [1K]3 years ago
6 0
First of all, we have to check out what the yearly decrease really amounted to. Then we'll know if the equation we are using is correct. 

If there is a 26% decrease, then there's 74% of the population that remains. So after 1 year, 74% of 426000 people still live in this community. How many people are still there?

P = 426000 * (74/100) ^1 
P = 315240  are still left in our community. What about the second year? This is really critical, because if we make a mistake in our theory, it will show up here.

P2 = 315240 * (74/100)
P2 = 233277 People still live in this community.


Could we have found P2 directly? Yes.
P2 = 426000 * 0.74^2
P2 = 233277 is the answer. So now we know what the answer to the question must be

year one:315240 is the population in the first year
year two:233277 is the population in the second year

Now we're ready to begin answering your question.
If we start out with 
P =426000 ((1 - 0.26)^1/12)^(12t) we should be able to get a monthly drop for a yearly %. You better read this over a couple of times to get the idea.

So  P = [426000*(.74)^(1/12)]^12t is what you do. By the law of powers, you have done nothing to the actual equation, because the 12s cancel.

Put this in your calculator
.74^(1/12) = 0.97522
Ans our equation becomes
P = 426000 * 0.97522^(12t) where t is in years.

To check the equation, we will let t = 1
P = 426000 * 0.97522^12 
P = 315240

But the acid test is year two.
P = 426000 * 0.97522^24
P = 233277 which checks with doing it one step at a time using 0.74

So the answer is 
P = a * 0.97522^12t 
b = 0.97522 
c = 12*t
Lisa [10]3 years ago
5 0
100%-26%
426000*(1-0.26)^t, yearly
(0.74^(1/12))=0.74^0.083 monthly rate of decrease
 Equation for calculation population
426000*(0.74^0.083)^12t

I think it should look like this 0.74^0.083 monthly rate of decrease
You might be interested in
PLS HELP WILL MARK YOU BRAINLIEST! NO FAKE ANSWERS
rusak2 [61]

Answer:

D. -19/2

Step-by-step explanation:

Well, we know that R is greater than Y and that at the midpoint, R is 10.5, so Y can't be greater than this (c, 13) and that it isn't the same (b, 10.5). It could either be -8 or -19/2 (which is -9.5). Being that your first coordinate is in fraction form, the second one would also have the be, making the answer D. -19/2

7 0
2 years ago
Read 2 more answers
Plz help me with this
iragen [17]

Answer:

i honestly have no clue

Step-by-step explanation: yeah

5 0
3 years ago
See below to answer this question
ipn [44]

Answer:

c. 6√2

Step-by-step explanation:

The step by step explanation is shown in the picture above

5 0
3 years ago
Read 2 more answers
First to get it right gets brainliest
777dan777 [17]

Answer:

C. r = d/2

Step-by-step explanation:

The radius is half of the diameter.

The diameter divided by 2 would equal the radius of a circle.

7 0
2 years ago
Read 2 more answers
The amount of time it takes to see a doctor a CPT-Memorial is normally distributed with a mean of 33 minutes and a standard devi
Eva8 [605]

Answer:

a) <em>Z-score = 0.75</em>

b) <em>Z-score = -32.833</em>

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given that mean of the Population = 33

Given a standard deviation of the Population = 12

Let 'X' be a random variable in a normal distribution

Let 'X' = 42

<u><em>Step(ii):-</em></u>

<em>      </em>Z = \frac{x-mean}{S.D}<em></em>

<em>     </em>Z = \frac{42-33}{12} = 0.75<em></em>

<u><em>Step(iii):-</em></u>

<em>Given that mean of the Population = 89</em>

Given a standard deviation of the Population = 1

Let 'X' be a random variable in a normal distribution

Let 'X⁻ = 82

<em>   </em>Z = \frac{x^{-} -mean}{\frac{S.D}{\sqrt{n} } }<em></em>

<em>     </em>Z = \frac{82-89}{\frac{1}{\sqrt{22} } } =  -32.833<em></em>

<em>Z-score = -32.833</em>

<em></em>

7 0
3 years ago
Other questions:
  • Evaluate the expression when b is 6 and t is -3  5bt
    8·2 answers
  • the regression equation y=-0.414 + 106.55 approximates the percent of people in an audience who finish watching a documentary, y
    13·2 answers
  • if jean and kim combined their weekly allowances they would have $12. Jeans allowance is $2 more than kim’s allowance
    5·1 answer
  • How to estamite 787÷2
    13·2 answers
  • Pedro thinks that he has a special relationship with the number 3. In particular, Pedro thinks that he would roll a 3 with a fai
    10·1 answer
  • A flat surface that extends without end in all directions and is named by three points that are not on the same line is known as
    11·1 answer
  • Zane has a bowl of raspberries and blackberries. There are 2 more raspberries than
    15·2 answers
  • Last question i will give brainliest
    5·2 answers
  • Please help!! I'll give anyone brainliest for correct answer!
    5·1 answer
  • OPRobert made a design on his wall with the similar pentagon tiles shownR9 cm9 cmKMQs15 cm10 cm10 cm15 cmUT10 cmP15 cmNnot drawn
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!