Complete Question
The complete question is shown on the first uploaded image
Answer:
The confidence level interval is 
Step-by-step explanation:
The sample size is 
The number planning to increase workforce is 
The confidence level is 
%
The value of proportion for a plus 4 method is
substituting values
The z-critical value at confidence level of 98% is
This values is obtained from the standard normal table
The confidence level interval can be mathematically represented as
substituting values
=>
<h2>20°</h2>
In this problem, we need to use some <u>division</u>.
To find the value of x, divide 4 from 80, and we get:
80 ÷ 4 = 20
The final answer is:
<h3>20°</h3>
To verify the answer, we need to multiply:
20 × 4 = 80
<em>Hope this helps :)</em>
The first stone will be 10-in wide
The last stone will be 10-in wide
The stones in the middle will be alternating between 5-in and 10-in stones, making a total of 15-in
Total width = 145-in
Width after placing first and last stones = 145 - 20 = 125-in
Number of 15-in patterns incorporated in 125-in:
125/15 = 8.33
Therefore, he will place 8 10-inch stones within and 9 5-inch stones within the patter.
The total 10-inch stones used = 8 + 2 = 10
The correct answer is 6(2+7)
Answer:
a. Local maximum = 50 units per week.
b. The graph is never concave upward.
c. (0, 80)
Step-by-step explanation:
a. The revenue function is:
The derivate of the revenue function for which R'(x) = 0 gives us the local extrema:
The second derivate of the revenue function determines if x =50 is local maximum or minimum:
Since the second derivate yields a negative value, x = 50 units per week is a local maximum.
b. Since there are no local minimums in the range of 0 < x < 80, the graph is never concave upward.
c. Since there is only one local maximum in the range of 0 < x < 80, the graph is concave downward from x>0 to x<80 or (0, 80)
