Can someone me with this step by step asap

The answer to your question is:    ⁰₁ e

Explanation:

                           ¹¹ ₆ C    ⇒     ¹¹₅ B   +   ⁰₁ e

because      11 + 11 = 0

                     6 = 5 + 1                        

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds