To find the area of a regular polygon, all you have to do is follow this simple formula: area = 1/2 x perimeter x apothem.
you can watch this!!
https://youtu.be/n1YKOggLjUQ
Answer:
The length of side AB is 5 units
Step-by-step explanation:
* Lets revise how to find the distance between two points
- If there are two points their coordinates are (x1 , y1) and (x2 , y2),
then we can find the distance between them by this rule:
d = √[(x2 - x1)² + (y2 - y1)²]
- Now lets solve the problem
∵ A = (4 , -5)
∵ B = (7 , -9)
- To find the length of AB use the rule of the distance above
- Let point A is (x1 , y1) and point B is (x2 , y2)
∵ x1 = 4 and x2 = 7
∵ y1 = -5 and y2 = -9
∴ AB = √[(7 - 4)² + (-9 - -5)²]
∴ AB = √[(3)² + (-4)²]
∴ AB = √[9 + 16] = √25 = 5
* The length of side AB is 5 units
Answer:
And using a calculator, excel ir the normal standard table we have that:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
Solution for the problem
Let's say that X represent the random variable "incomes in a certain large population of college", and we know that the distribution for X is:
We select 16 teachers and we are interested on the sample mean or average, and we know that the distribution for the sample mean is given by:
And we are interested on this probability:
And we can use the z score given by:
And using a calculator, excel ir the normal standard table we have that:
<span>3.1415926535897 are the first 14 digits</span>
Answer:
x < -3 but not including -3/open circle at -3
Step-by-step explanation:
<u>Step 1: Add 3 to both sides</u>
2x - 3 + 3 < -9 + 3
<em>2x < -6</em>
<em />
<u>Step 2: Divide both sides by 2</u>
2x / 2 < -6 / 2
<em>x < -3</em>
<em />
Answer: x < -3 but not including -3/open circle at -3