Answer:
The expression is :
π[cd) + π(g,h) ],[π(e,f)+π(a,b)])
We will use foreign key and primary key
Answer:
Explanation:
This probably means that your browser has saved your username and password into the browser's password manager. This usually occurs the first time you enter your username and password into a new website. The browser will detect this and request to save this information into the password manager. If you agree to do so it will save it and automatically enter this information when opening the site in the future.
Answer:
An alert appears on the other devices
Explanation:
On social media platforms, whenever some one make a post, all the person who are using that social media app and present in the friend circle of that particular person receive an alert containing the information of the post.
The alert that received by different users on a social media platform is known as Notification. This notification is a type of text, in which the activity performed by post creator is mentioned, this text is received with the tone called notification tone.
The purpose of the alert is to informs the friends who are using that social media platform that a post has been published by someone.
Answer:
The body of water that is most likely to be a marine ecosystem would be an estuary.
Explanation:
An estuary is a widened, often funnel-shaped mouth of a river, where fresh river water and salt sea water are mixed and thus brackish water is created, and where tidal differences can be observed. When a river flows as a system of branches, it is called a delta.
Estuaries often have a great natural value. They typically consist of swallows and salt marshes that are very rich in invertebrates and thus have a great attraction for birds, among other things.
The
process that aids managers to better understand the processes through which
they are performed most effectively by gathering and organizing detailed
information about various jobs within an organization so that is called Job
analysis and is performed by a job analyst in an organization. Occupational
Information Network (O*Net) is a database that provides both basic and advanced
job-analysis information; as such, IT can be viewed as an alternative to
conducting job analysis. O*NET
OnLine has detailed descriptions of the world of work for use by job seekers,
workforce development and HR professionals, students, researchers, and more. It
is a tool for career exploration and job analysis.
