1. A grayhound's maximum speed is 39.35 mph how long does it take to run a quarter mile?

2. A human's maximum speed is 27.89 mph how long does it take to run a quarter mile?
3. A giant tortoise's maximum speed is 0.17 mph how long does it take to run a quarter mile
4. A three toed sloth's maximum speed is 0.15 mph how long does it take to run a quarter mile?

#1: naturally, (1/4)/39.35 hours

time = distance/speed

To calculate the time it takes to run a quarter mile for each of these animals, we can use the formula: Time = Distance/Speed.

1. For a greyhound with a maximum speed of 39.35 mph:
Time = 0.25 miles / 39.35 mph
Time = 0.00635 hours or approximately 22.86 seconds.

2. For a human with a maximum speed of 27.89 mph:
Time = 0.25 miles / 27.89 mph
Time = 0.00897 hours or approximately 32.31 seconds.

3. For a giant tortoise with a maximum speed of 0.17 mph:
Time = 0.25 miles / 0.17 mph
Time = 1.471 hours or approximately 88.29 minutes.

4. For a three-toed sloth with a maximum speed of 0.15 mph:
Time = 0.25 miles / 0.15 mph
Time = 1.667 hours or approximately 100 minutes.

Note: Keep in mind that these calculations are based on the maximum speeds provided for each animal and assume that the animals can maintain their top speed over the entire distance. In reality, different factors, such as fatigue, terrain, and environmental conditions, might affect the actual time it takes for each animal to cover the distance.