I need help with teacher Class List on codehs

Which of the following is a way the operating system prevents unknown or unauthorized users from accessing the system?

In cell h5 enter a formula that will calculate the percentage of attendees that went to the altamonte springs job fair in 2018.

Andy would like to create a bulleted list. how should he do this? andy should click on the bullet icon or select the bullet option from the menu and then type the list. andy should press the shift key and the 8 key at the beginning of each line of text. andy should type the text and then click on the bullet command. andy should press return and the bullets will automatically