Sammantha is traveling with her family in the car. if the car is moving at an average speed of 45 miles per hour how mnah miles can they travel in 3 hours use the formula r-t where r represents the rate or speed and t representsthe time

Use the formula distance = rate times time.  

Here, rate = 45 mph and time = 3 hours.  Thus, distance traveled is:

(45 mph)(3 hrs) = 135 miles (answer)

In more general terms, distance traveled as a function of time is

d(t) = (r)(t), where r is the average speed and t is the travel time in hours, and (r)(t) represents the product of the rate and the time.