I don’t know what a CSS class is or how to Awnser these questions

Carlos, an algebra teacher, is creating a series of powerpoint presentations to use during class lectures. after writing, formatting, and stylizing the first presentation, he would like to begin writing the next presentation. he plans to insert all-new content, but he wants to have the same formatting and style as in the first one. what would be the most efficient way for carlos to begin creating the new presentation? going under the file tab and opening the first presentation, deleting all content from each page, and adding new content going under the file tab and clicking on new in the left pane, then choosing new from existing going under the design tab and clicking on themes, then selecting the theme that was used for the first template going under the design tab and opening the template that was created for the first presentation

Which sentence supports the fact that we always see the same side of the moon? the moon takes about four weeks to rotate once on its axis and about the same time to orbit the earth. the gravitational effect of earth has slowed the rotational period of the moon to match its orbit. since the rotational period is exactly the same as the orbital period, the same portion of the moon always faces earth. as the moon orbits earth, the lit side that we see changes in size. these changes are called the lunar phases.

Acompression technique whis means the image does not lose quality when its compressed