A student runs 100 meters in 11 seconds. What is the speed of the student?
speed = distance over time; 1 mile = 1609 meters
9.1 miles per hour
16 miles per hour
20.3 miles per hour
24 miles per hour
pls help
20.3
100m/11s * 1mi/1609m * 3600s/hr = 20.3 mi/hr
Just keep track of the units, and use the conversion factors that make them cancel out the way you want.
To find the speed of the student, we can use the formula: speed = distance / time.
In this case, the distance the student ran is 100 meters and the time taken is 11 seconds.
So, we can calculate the speed as follows: speed = 100 meters / 11 seconds.
Now, we need to convert the speed from meters per second to miles per hour.
Given that 1 mile is equal to 1609 meters, we can calculate the speed in miles per hour using the following conversion factor:
1 mile / 1609 meters * 3600 seconds / 1 hour.
Let's do the math:
speed = (100 meters / 11 seconds) * (1 mile / 1609 meters) * (3600 seconds / 1 hour)
Simplifying this equation, we get:
speed = 100 * 3600 / (11 * 1609) miles per hour
After evaluating this expression, we find that the speed is approximately 20.3 miles per hour.
Therefore, the correct answer is 20.3 miles per hour.