Answer:
99% Confidence interval: (1196,1973)
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 20
Mean, μ = 1584
Standard Deviation, σ = 607
99% Confidence interval:
Putting the values, we get,

Thus, there is a 99% chance that it will break in approximately 1196 to 1972
You need a little more information. Take a picture of the oroblem
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Answer: Overall, the steps for algebraically finding the range of a function are:
Write down y=f(x) and then solve the equation for x, giving something of the form x=g(y).
Find the domain of g(y), and this will be the range of f(x). ...
If you can't seem to solve for x, then try graphing the function to find the range.
Step-by-step explanation:
I'm a little confused by your question.
You said 60-8 = 52 which is true.
Then, you asked 4x = 52 in an integer form
x = 52/4
x = 13. (Is that what you're asking?)
I'm not sure if this helps, but please comment if you need any help! Hope this helps though! :D