Question

John Ross holds the record for the 40-yard dash at the NFL combine. If Ross ran at an average speed of 9.48 yards/second, calculate the amount of time it took him to finish the race.

A. 4.22 seconds

B. 4.23 seconds

C. 4.24 seconds

D. 4.25 seconds

Answer 1

The time it took John Ross to finish the 40-yard dash at an average speed of 9.48 yards/second is calculated as 40 yards divided by 9.48 yards/second, resulting in approximately 4.21983122363 seconds. When rounded to the nearest hundredth of a second, the time is 4.22 seconds, corresponding to answer choice A.

Step-by-step explanation:

To calculate the amount of time it took John Ross to finish the 40-yard dash at the NFL combine with an average speed of 9.48 yards/second, you use the formula for speed, which is speed = distance / time. We can rearrange this formula to solve for time: time = distance / speed.

Given that the distance of a 40-yard dash is 40 yards and Ross's speed is 9.48 yards/second, the calculation is:

• time = 40 yards / 9.48 yards/second

Performing the division gives us:

• time ≈ 4.21983122363 seconds

Rounded to the nearest hundredth of a second, the time is approximately 4.22 seconds, which corresponds to answer choice A.