Round 18.2044986022 to the nearest hundred-thousandth.

The answer is 18.2045

Step-by-step explanation:

In order to determine the rounded number, we have to know about the notation numbers. In any number, every digit has a unique notation depending on his place.

I have attached an image that shows some notation numbers. We can see that the hundred-thousandth place is the fifth digit after the decimal point.

Then we have to see the next digit. If the digit is greater or equal than 5, we have to increase in one unit the number in the place we want to round. If not, the number does not change.

In this case:

Fifth decimal number is 9

Sixth decimal number is 8, so we have to increase 9 by 1.

Finally the number is 18.2045

just take the area of the square and then the area of the circle then subtract the circle area from the squares area

step-by-step explanation:

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads