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IgorLugansk [536]
2 years ago
6

Find the mean and standard deviation of the

Mathematics
2 answers:
ra1l [238]2 years ago
8 0

Answer:

mean= 51.25 std dev.= 9.4

Step-by-step explanation:

Mean= you add up all of the numbers to 410, then divide by 8 because thats how many numbers there are.

standard dev. = 9.43066805693

here is a link for the website I used:  

http://www.alcula.com/calculators/statistics/standard-deviation/

LiRa [457]2 years ago
4 0

Answer:

Step-by-step explanation: mean: add all the numbers together then divide the amount of numbers by the sum. the mean is 51.25.

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saveliy_v [14]
Since the triangle is an equilateral triangle we know all of it's sides must be the same length, with that in mind the angles that make up the triangle must be equal as well. Knowing that a triangle's three interior angles make up 180 degrees we know that the size of each angle must be one third of this (as each angle must be equal).

180/3 = 60


then we may split the triangle along it's altitude into two special right triangles
more specifically two 30-60-90 triangles.

this means that the side with 30 degrees will be some value "x" where the side for 60 degrees will be related as it is "x*sqrt(3)" and the hypotenuse (which would be the side of the triangle) would be proportionally "2x"

this would mean that the altitude is the side associated with the 60 degree angle as such we can solve for "x" using this.

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now we may solve for the side length of the triangle which is "2x"

2*4sqrt(3) ->   8sqrt (3)  

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iVinArrow [24]

Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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