In a relational database, the three basic operations used to develop useful sets of data are:


A spreadsheet is a software application which is used to display numerical data in a tabular form. It has <em>further functions</em> which includes organizing, displaying, calculating data, etc where the data can be viewed at a glance and retrieved from memory.
There are <em>different types</em> of spreadsheet which includes:
- <u>G00gle Sheet</u>
- <u>Microsoft Excel</u>
- <u>LibreOffice</u>
- <u>Smartsheet,</u> etc.
Data can be arranged in rows and columns.
Please note that your question is incomplete so I gave you a general overview to help you get a better understanding of the concept.
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Answer:
ngl why would i know this
Explanation:
3. 8.1
Looking at the functions "average", and "mystery" it's pretty obvious that "average" returns a double precision average of the value of an integer array. The function "mystery" returns an array of integers with each value in the array being the length of the string in the array of strings passed to "mystery" in the same ordinal position.
The main body of the code initializes an array of strings and then passes that array to "mystery" who's output is then passed into the function "average". Since the lengths of the words passed to "mystery" is 7, 5, 6, 10, 10, 8, 13, 6, 8, 8, the sum will be 81, so the average will be 81/10 = 8.1 which matches option "3".
Crowdsourcing is used by mobile application that allows users to report the location of a pet that appears to be lost.
<h3>What is a mobile application?</h3>
A mobile application is known to be a kind of computer app or program that has been made to handle or run itself on a mobile device e.g. phone, etc.
Conclusively, the option that best describes a system that uses crowdsourcing is the mobile application that allows users to report the location of a pet that appears to be lost and upload a photo that is made available to other users of the application and thus everyone can help to look for it.
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