If the population of a town is decreasing by 4% per year and started with 12,500 residents, which of the following is its projected population in 10 years?

1-9,230
2-76
3-18,503
4-8,310

The population of town after 10 years is 8300 unit .

Step-by-step explanation:

Given as :

The rate of decrease of population of town = 4%

The initial population of town = 12,500 unit

Let The population of town after 10 years = P

So ,

The population of town after n years = initial population ×

Or, The population of town after 10 years = 12,500 ×

Or,  The population of town after 10 years = 12,500 ×

∴ The population of town after 10 years = 12,500  × 0.664 = 8300 unit

Hence The population of town after 10 years is 8300 unit .  Answer

The population after 10 years will be 8310 approximately.

Option - 4

SOLUTION:

Given that, the population of a town is decreasing by per year and started with 12,500 residents,

We have to find its projected population in 10 years. We can use the formula  

Then, population after 10 years

ROUNDING OFF RULES:

Step 1: First, look at the digit to the immediate right of rounding off the digit

Step 2: If that digit is less than 5, do not change the rounding digit but drop all digits to the right of it.

Step 3: If that digit is greater than or equal to five, add one to the rounding digit and drop all digits to the right of it.

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step-by-step explanation:

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared