Final answer:
Bethany pays a sales tax rate of 6% on the clothes she buys in Iowa.
Step-by-step explanation:
To determine the sales tax rate that Bethany pays on the clothes she buys, we need to identify the state where she buys her clothes. According to the given information, Bethany buys her clothes in Iowa. Therefore, we need to look at the sales tax rate for Iowa, which is 6% based on the provided table. So, Bethany pays a sales tax rate of 6% on the clothes she buys in Iowa.