Answer:


An we can use the normal standard table and the following difference and we got this result:

Step-by-step explanation:
Assuming this statement to complete the problem "with a standard deviation 5 mpg"
We have the following info given:
represent the mean
represent the deviation
We have a sample size of n = 54 and we want to find this probability:

And for this case since the sample size is large enough >30 we can apply the central limit theorem and then we can use this distribution:

And we can use the z score formula given by:

And replacing we got:


An we can use the normal standard table and the following difference and we got this result:

Find mph
120/3 = 40 mph
200/40 = 5 hours to travel 200 miles
Im not sure really sorry, hope somebody can help you.
That would be 2 numbers. they are 10 and -10.
Answer:

Step-by-step explanation:
Given


Required
Determine 
In functions;

So, we have:


Substitute values for R(x) and C(x)

Open bracket

Collect Like Terms

