To measure the pollution of a particular river, one must take the sample of the river and take the sample of pure water, then draw the conclusion, it will tell the amount of pollution in the river water.
<h3>What is pollution?</h3>
Pollution is the mixing of unwanted or harmful things in any substance or compound.
Water pollution is the mixing of toxics and chemicals in water.
Thus, to measure the pollution of a particular river, one must take the sample of the river and take the sample of pure water, then draw the conclusion, it will tell the amount of pollution in the river water.
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Bookstore and BookSearch are the two entities for the given scenario.
Explanation:
- For the given Book.com virtual store, there can be two entities like Bookstore and BookSearch.
- Bookstore can have all the details of the books in the virtual store. hence the attributes can be
- Bookstore attributes: bookname, Authorname, Publisher, Publishedyear, Agegroup, category.
- BookSearch entity can be used to search the books in the virtual store.
- Booksearch attributes: bookname, category, bookid, authorname.
Answer:
C. Rulers indicate the margins, tabs, and indents in a presentation slide.
Explanation:
The status bar appears at the bottom of the page, and it never displays options the options to style the slides. And the toolbar never displays the thumbnails of the slides, as well as the document area never provides a list of the commands for creating, formatting or editing the presentations. However, the rules do indicates the margins, tabs, and indents in a presentation slide. Hence C. is the right option.
Answer:
The expression is "t[k]".
Explanation:
In the question, it is defined that variable k refers to positive integer and variable t refers to a tuple that holds at least k+1 element. The expression for defining the kth element of t is t[k].
- Where variable t is tuple that collects a sequence of immutable (in-built) Python objects. To define tuple we use the parentheses.
- The main purpose to use tuple in this question is that it cannot be changed.
