a sprinter runs 222yds in 25.2s find her average speed in yds/s

This really is an elementary question.

distance=avgvelocity*time

solve for avgvelocity

8.81 yds

To find the average speed of the sprinter in yards per second, you need to divide the distance covered by the time taken. In this case, the distance covered is 222 yards, and the time taken is 25.2 seconds.

To calculate the average speed, you can use the formula:
Average speed = Distance / Time

Plugging in the values, we have:
Average speed = 222 yards / 25.2 seconds

To simplify the calculation, divide 222 by 25.2:
Average speed ≈ 8.81 yards per second

Therefore, the average speed of the sprinter is approximately 8.81 yards per second.