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Answer:
95
Step-by-step explanation:
If the mean is 400 and the standard deviation 12.5. It means that a range between 375 and 425 is the mean +- 2 standard deviations
400 - 12.5*2 = 375
400 + 12.5*2 = 425
Which means the probability is 95%
When you are looking for +- 1 deviation standard the probability is 68, and for +- 3 the probability is 99.7
There is a more complex explanation based on Z, but assuming you are only applying 68-95-99.7 rule this should be enough.
Answer:
The answer is

Step-by-step explanation:
To find an equation of a line in point slope form when given the slope and a point we use the formula

where
m is the slope
( x1 , y1) is the point
From the question the point is (-3,7) and slope 1/2
We have

Hope this helps you
Answer:
x = 3.65
Step-by-step explanation:
7.4x + 5 = 32
-5 -5
7.4x = 27
----- -----
7.4 7.4
x = 3.64864865
This rounds to 3.65
x = 3.65