Final answer:
The component form of the resultant vector f is (20, 21). To find 8f, multiply each component of f by 8 to get (160, 168).
Step-by-step explanation:
Step 1: Find the component form of the resultant vector f by separating it into its x and y components. The x component of f is 20 and the y component of f is 21. Therefore, the component form of f is (20, 21).
Step 2: Multiply each component of f by 8 to find 8f. Multiplying the x component by 8 gives 8 * 20 = 160, and multiplying the y component by 8 gives 8 * 21 = 168. Therefore, the component form of 8f is (160, 168).