Consider a relation R with atributeset{A, B,C, D}={A→B, B→C, C→D}.This relation is decomposed into three sub relations{AB, BC, CD}. Check if the decomposition is dependency preserving or not. Discuss.{A, B,C, D}={A→B, B→C, C→D}.{AB, BC, CD}. .Discuss.

Sally is editing her science report about living things. she needs to copy a paragraph from her original report. order the steps sally needs to do to copy the text to her new document.

Which statistical function in a spreadsheet you to see how far each number varies, on average, from the average value of the list?

Which of these is a benefit of using objects in a powerpoint presentation? a. collaborators can create the external files while you create and edit the slide show. b. you can easily change the theme and design of the presentation. c. you can have older data in the source file while having up-to-date data in the presentation. d. collaborators can easily share the presentation.