Read and take notes on Text Sections 10.4 and 10.6.

Work Sections 9.4 and 9.6 problems at the link Ch 9 Problems.  These problems correspond to Ch 10.4 and 10.6 of the present edition of the text.

The 'Ch 9' reference is to the sequencing of chapters in an earlier edition of the book.  Ch 9 in that text corresponds to Ch 10 in the present version.