<h2>
Answer:</h2>
<u>The correct option is </u><u>The letter on the front will be N. The letter on the back will be L.
</u>
<h2>
Step-by-step explanation:</h2>
When we fold the given net, we will get Q,P,M and N on sides. Side M will come to the top, side Q on the right side, side P on the left and side O on the bottom. The side which comes to the front will be N of the observer and similarly the side L will come to the back of the rectangular prism.
Answer:
(a) 
(b) 
Step-by-step explanation:

Take
of of each term.

For Question a

Given that x = 3, y = 4, and dx/dt = 5.

For Question b

Given that x = 4, y = 3, and dx/dt = -5.

Answer: The correct option is 1.
Explanation:
The given piecewise function is,

It means if x<0, then

If
, then

Since the f(x) is defined for x<0 and
, therefore the function f(x) is not defined for
.
From the graph 2, 3 and 4 we can easily noticed that for each value of x there exist a unique value of y, therefore the function is defined for all values of x, which is not true according to the given piecewise function.
Only in figure the value of y not exist when x lies between 0 to 2, including 0. It means the function is not defined for
, hence the first option is correct.
Answer:
Explanatory variable : web page design
Response variables : Visitor's rating and amount of time visiting the site.
Kindly check explanation for the rest.
Step-by-step explanation:
The explanatory variable simply means the independent or predictor variable which is used to bring about a change in the dependent or predicted variable. The explanatory variable in the scenario above is the web page design which is used to measure the behavior and changes in the response variable which are the rating given by visitors and the number of visits on each of the two different web page designs available (explanatory variable).
The confounding factor which may affect the study is the different area assigned to test the effectiveness of each page ; designating one page for the Oakland area and the other for Miami. User preferences for each area may itself mask the actual outcome of the experiment.