Final answer:
Tyler should subtract 20% from the regular price to find the sale price of the hat. This involves converting 20% to its decimal form, 0.2, multiplying it with the regular price, and subtracting the result from the regular price.
Step-by-step explanation:
To determine the sale price of a hat that Tyler wants to buy, which is 20% off the regular price, Tyler should subtract 20% from the regular price. This can be done by multiplying the regular price by 0.2 (which is the decimal form of 20%), and then subtracting that amount from the regular price. Therefore, the correct option is b) Subtract 20% from the regular price.