Tom Is Selling Water Purification Systems on an E-Commerce Site

Multiple Choice

Tom is selling water purification systems on an e-commerce site, and he wants to know his conversion cost for his latest Facebook ad. He's spending 40 cents each time a Facebook user clicks on his ad, and his conversion rate is 0.11. Which of the following best represents his conversion cost? ​

A) 0.44
B) 0.40
C) 0.04
D) 4