Among the given runners, Jessica runs the fastest with a speed of 13.2 feet per second. Option B. Jessica runs 66 feet in 5 seconds.
To determine who runs the fastest among the given runners, we need to compare their speeds in a consistent unit. Let's convert the speeds to feet per second for an accurate comparison:
a. Emily runs 12 feet per second.
b. Jessica runs 66 feet in 5 seconds.
=> Speed = Distance/Time = 66 feet / 5 seconds = 13.2 feet per second.
c. Frank runs 1 mile in 469 seconds.
=> Convert 1 mile to feet: 1 mile = 5280 feet.
=> Speed = Distance/Time = 5280 feet / 469 seconds = 11.25 feet per second.
d. Adam runs 576 feet in 1 minute.
=> Convert 1 minute to seconds: 1 minute = 60 seconds.
=> Speed = Distance/Time = 576 feet / 60 seconds = 9.6 feet per second.
Comparing the speeds, we find that:
- Emily runs at 12 feet per second.
- Jessica runs at 13.2 feet per second.
- Frank runs at 11.25 feet per second.
- Adam runs at 9.6 feet per second.
Therefore, Jessica runs the fastest among the given runners with a speed of 13.2 feet per second.