Answer:
A: Letter
and
C: Articles of Clothing
Explanation:
Primary Sources are immediate, first-hand accounts of a topic, from people who had a direct connection with it. Primary sources can include; Texts of laws and other original documents. Newspaper reports, by reporters who witnessed an event or who quote people who did.
The answer is Count. Count is an aggregate method in SQL that returns the number of rows for a specified column that have non-null values.
<h3>What is the Meaning of Null?</h3>
When a field in a database has no values at all, this is known as null and indicates that the field’s value is unknown.
A null value for a number field, text field, or space value is different from a zero value. Null indicates that no value has been recorded in a database field.
A value and a null cannot be compared. The Structured Query Language query cannot be written as SELECT * FROM Customer where email Address=null, for instance, if it is intended to obtain all customers without email addresses from a Customer Addresses table.
To know more about count visit:
brainly.com/question/13591189
#SPJ4
Answer:
1. Cartography
2. Navigational compass
3.Photography
4. Internet
Explanation:
Cartography: is a method of designing, creating and studying geographic locations on flat surfaces like maps. This scientific method dates to some thousands of years ago. It dates to pre-historic times as far back as 2300 BCE when the Babylonians represented locations in clay tablets.
Navigational compass: is thought to have originated in the Han Dynasty in China between the 2nd century BC and the 1st century AD. Then it was used for fortune-telling and was called the "South Pointing Fish." It was adapted as a navigational compass in the Song Dynasty in the 11th century.
Photography: This originated in the 19th century precisely the late 1830's when Nicéphore Niépce captured the pewter plate exposed t light and coated with bitumen. In the later part of the century, geographers began adapting it to their work.
Internet: the inventions of computers in the 1950's came along with the internet that has been a useful resource for geographers.
The answer is D.<span>Egypt</span>
