7. 8. 9. need help
Do not comment/answer for the points. ty

7. VIDEO CONFERENCING
When there is a meeting that involves video (because participants can hear, see and talk to each other) and sounds using internet connection and is happening real-time, it is known as Video Conferencing.
8.ONLINE SURVEY
because i found in my book
9.FORMULA
PA BRAINLIEST NAMAN PO