The difference between both unit rates rounded off to the nearest tenth is: 0.4 meters per second
Step-by-step explanation:
We have to calculate his unit rate for both type of races
So,
Unit rate for 400m race:
Distance = 400m
Time = 43 sec
[tex]Unit\ rate = U_1= \frac{Distance}{Time}\\=\frac{400}{43}\\=9.30\ meters\ per\ second[/tex]
Unit rate for 300m Race:
Distance = 300m
Time = 31 sec
[tex]Unit\ Rate= U_2=\frac{300}{31}\\=9.68\ meters\ per\ second[/tex]
The difference between both unit rates is:
[tex]U_2-U_1 = 9.68-9.30\\=0.38 => 0.4\ meters\ per\ sec[/tex]
Hence,
The difference between both unit rates rounded off to the nearest tenth is: 0.4 meters per second
Keywords: Unit rate, Speed
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