He should use a sample size of 655.
We can use the formula
We find the z-value by first subtracting the confidence level from 1:
1 - 0.8 = 0.2
Divide this by 2:
0.2/2 = 0.1
Subtract this from 1:
1 - 0.1 = 0.9
Using a z-table (http://www.z-table.com) we find the z-score associated with this is 1.28.
Now we plug our information into our formula:
I think the answer is b i've never learned this sorry :(
Answer:
Part 1)
Part 2)
Step-by-step explanation:
Part 1) we know that
To put factor back into the square root, we have to put squared value
we have
Remember that
substitute in the expression above
Part 2) we have
Solve for x
That means----> Isolate the variable x
Multiply in cross
Apply distributive property
Group terms
Factor x left side
Divide by (2c-ab) both sides
Answer:
(6, 5) will be the point after the rule is applied
Answer:
The quotient of 24 and d would be
Step-by-step explanation:
Quotient is the answer of a division problem. So, you would divide 24 by d.