Question

Given the speeds of each runner below, determine who runs the fastest. \text{Debbie runs 15 feet per second.} Debbie runs 15 feet per second. \text{Liz runs 112 feet in 11 seconds.} Liz runs 112 feet in 11 seconds. \text{Stephanie runs 1 mile in 411 seconds.} Stephanie runs 1 mile in 411 seconds. \text{Tony runs 581 feet in 1 minute.} Tony runs 581 feet in 1 minute.

Answer 1

After converting all the runners' speeds into the same unit, it's determined that Debbie is the fastest runner with a speed of 15 feet per second.

Step-by-step explanation:

To determine who runs the fastest, we need to calculate the speed of each runner in the same unit, such as feet per second (ft/s) or miles per hour (mph).

First, we already have Debbie's speed as 15 ft/s.

Next, Liz runs 112 feet in 11 seconds, which means her speed is 112 ft / 11 s = 10.18 ft/s.

For Stephanie, she runs 1 mile in 411 seconds. There are 5280 feet in a mile, so her speed is 5280 ft / 411 s = 12.85 ft/s.

Finally, Tony runs 581 feet in 1 minute (60 seconds), so his speed is 581 ft / 60 s = 9.68 ft/s.

By comparing these speeds, it's clear that Debbie runs the fastest at 15 ft/s.