A vendor asks its business partners to place logos or banners on their Web sites. If customers click on a logo, visit the vendor’s site, and make a purchase, then the vendor pays a commission to the partner. This scenario illustrates which business model?

Affiliate marketing

Explanation: Affiliate marketing is a type of performance-based marketing in which a business rewards one or more affiliates for each visitor or customer brought by the affiliate's own efforts of marketing. Affiliate marketing is the process of earning a commission by promoting other people's (or company's) products. The scenario above illustrates affiliate marketing, because If customers click on a logo, visit the vendor’s site, and make a purchase, then the vendor pays a commission to the partner.

answer; dividing net income by 1- t ;

answer (b); /// a method of measuring the opinions of a large group of people by selecting a subset of the larger group, asking them a set of questions and then generalizing those responses;