Answer:
D
Step-by-step explanation:
Let's find unit rate of each (number of miles traveled in 1 hour). For that we will divide the distance by time to get the unit rate.
Note: [tex]rate=\frac{Distance}{Time}[/tex]
(A)
rate = [tex]\frac{300}{4}=75[/tex] mph (miles per hour)
(B)
rate = [tex]\frac{450}{6}=75[/tex] mph
(C)
rate = [tex]\frac{750}{10}=75[/tex] mph
(D)
rate = [tex]\frac{800}{12}=66\frac{2}{3}[/tex] mph
As we can see, the first 3 rates are same, 75 mph, and the last one is [tex]66\frac{2}{3}[/tex] mph. So clearly, the last rate is the slowest.
D is the right answer.
