Question

Marty wants his last run to be in the top 15% of all the possible speeds. What speed does he need to achieve to be in the top 15%?

Answer 1

Marty needs to achieve a speed higher than the 85th percentile speed to be in the top 15%.

Step-by-step explanation:

In order for Marty's last run to be in the top 15% of all possible speeds, he needs to achieve a speed that is higher than 85% of the other speeds.

To find the speed Marty needs to achieve, we can use the concept of percentiles. The 85th percentile represents the speed Marty needs to beat in order to be in the top 15%. So, Marty needs to achieve a speed greater than the 85th percentile speed.

For example, if the 85th percentile speed is 10 miles per hour, Marty would need to achieve a speed higher than 10 miles per hour to be in the top 15%.