Answer:
Hey mate, please describe your question perfectly.
The Minimum sample size table is attached below
Answer:

Step-by-step explanation:
From the question we are told that:
Confidence Interval 
Variance 
Generally going through the table the
Minimum sample size is

Answer:
Following are the responses to the given choice:
Step-by-step explanation:
For point a:

For point b:

For point c:

For point d:
Reject
. It could deduce that the pay of higher banking is considerably lower than the pay of higher project management.
Answer:
g(x) = Negative two-fifths(10)x
Step-by-step explanation:
In order to reflect a function over the x-axis, you have to multiply the function by minus one.
Given the function:
f(x) = 2/5(10)^x
Its reflection over the x-axis is:
-f(x) = -2/5(10)^x = g(x)