Answer:
Q1: The unknown is the rate.
Q2: rate = distance/time
Q3: rate = 54 miles/hour
Explanation:
Question 1:
distance = 108 miles known
time = 2 hours known
speed = rate = ? unknown
The unknown is the rate.
Question 2:
rate = speed = distance/time
rate = distance/time
Question 3:
rate = distance/time
rate = (108 miles)/(2 hours)
rate = 54 miles/hour