So, what it is saying in words is 180 is to x as 12 is to 24. So, determine what relates the second half of the problem, which would be 12 is half of 24. Therefore, 12 times 2 is 24. So, x is 360 because 180 times two is 360.
Answer:
$25
Step-by-step explanation:
i have an odd method of solving these types of equations
25x=100
x=4
340/4 = 85
85 x 3 = 255
Answer:
475.
Step-by-step explanation:
We have been given that for a normal distribution with μ=500 and σ=100. We are asked to find the minimum score that is necessary to be in the top 60% of the distribution.
We will use z-score formula and normal distribution table to solve our given problem.
![z=\frac{x-\mu}{\sigma}](https://tex.z-dn.net/?f=z%3D%5Cfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D)
Top 60% means greater than 40%.
Let us find z-score corresponding to normal score to 40% or 0.40.
Using normal distribution table, we got a z-score of
.
Upon substituting our given values in z-score formula, we will get:
![-0.25=\frac{x-500}{100}](https://tex.z-dn.net/?f=-0.25%3D%5Cfrac%7Bx-500%7D%7B100%7D)
![-0.25*100=\frac{x-500}{100}*100](https://tex.z-dn.net/?f=-0.25%2A100%3D%5Cfrac%7Bx-500%7D%7B100%7D%2A100)
![-25=x-500](https://tex.z-dn.net/?f=-25%3Dx-500)
![-25+500=x-500+500](https://tex.z-dn.net/?f=-25%2B500%3Dx-500%2B500)
![x=475](https://tex.z-dn.net/?f=x%3D475)
Therefore, the minimum score necessary to be in the top 60% of the distribution is 475.
Answer: if im not wrong it would be 1583/1000
Step-by-step explanation: