Atextbook is best described as which of these kinds of writing? expository prose fiction 4 writing scientific writing

Information based text are giving out information to readers so textbooks are expository proses. Manuals and news articles are also expository prose because they are exposing facts. You will get information that is considered to be generally accepted by a huge number of people. Other examples are recipes and self-help books. Like manuals, recipes help you get valuable information to cook your favorite dish. And self-help books expose you to new ideas that you may well use for your own. 

answer:

the first problem is 1

second is 1/3

the third is 3

the fourth is 1

fifth is 1/3