suppose the population of a certain city is 3031 thousand. it is expected to decrease to 2246 thousand in 50 years. find the percent decrease
%
the percent decrease is approximately
(round to the nearest tenth )

The rate at which the population decrease is 59.8 %  

Step-by-step explanation:

Given as :

The population of city = 30,31,000

Now The population of city decrease to 22,46,000

The time period in which population decrease is 50 years

Let the percentage rate of decrease = R%

So,

Final population = initial population ×

Or, 22,46,000 = 30,31,000 ×

Or, =  

Or, =

=

So , 0.99402 =

Or,   = 1 - 0.99402

So, Rate = × 100

Or, Rate = 0.598 = 59.8 %

Hence The rate at which the population decrease is 59.8 %  Answer

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

c: y > - 1/6x + 1

step-by-step explanation:

dashed line - meaning this < or > also not equal

solid line - meaning this < or > also equal

your answer is c because y > means up & it's shaded up, but y < means down

hope this ! : )