What is the acceleration of a runner who goes from 1.4 m/s to 2.2 m/s in fourseconds?

Find the difference in speed:

2.2 - 1.4 = 0.8 m/s

Now divide the difference in speed by time:

0.8 m/s / 4 seconds = 0.2 m/s/s

step-by-step explanation:

i have done this all on a piece of paper but idk how to put it on here cuz it needs to be drawn

other answer is correct. i had used the radius of the radius somehow. a website: