Katie can walk at a rate of 4 miles per hour. Her total distance in t hours is d.

4t miles per hour

Step-by-step explanation:

Distance refers to the amount of space an object can cover within a period of time. It can be calculated by multiplying speed and time.

Distance = speed * time

Speed is the rate of movement of an object from one place to another.

Speed = Distance/Time.

Time = distance/speed.

If Katie walks at the rate of 4miles per hour.

Her total distance in the hours is d

Total distance = speed * time

Her speed=4miles per hour

Time = t

Katie's total distance=4 miles per hour * t

=4t miles per hour