Astudent ran the 100-m dash in 15.4 s. what was the student’s speed in miles per hour?

Speed of the student was 14.51 miles per hour.

Step-by-step explanation:

A student ran the dash = 100 m

Since 1 meter = 0.000621 miles

Therefore, 100 meter = 100× 0.000621

                                   = 0.0621 miles

He ran the dash in 15.4 seconds

∵ 3600 seconds = 1 hour

∴1 second = hour

∴ 15.4 seconds = hour

                         = 0.00428 hours

Now we know the formula to calculate the speed

Speed =

           = miles per hour

           = 14.51 miles per hour

Speed of the student was 14.51 miles per hour.

answer4 to the second power is 16

and 4 to the third power is 64,