Final answer:
Using the speed calculation of 70 miles per hour based on the initial 210 miles covered in 3 hours, Ms. Slusarczyk would take 6 hours to drive 420 miles at the same speed.
Step-by-step explanation:
The question asks how long it will take Ms. Slusarczyk to drive 420 miles if she drives at the same speed as she did when it took her 3 hours to drive 210 miles. To solve this, we first need to find the speed at which she drives.
We use the formula for speed which is distance divided by time.
Speed = 210 miles / 3 hours = 70 miles per hour.
Now, to find out how long it will take to drive 420 miles at this speed, we use the formula for time, which is distance divided by speed.
Time = 420 miles / 70 miles per hour = 6 hours.
So, it will take Ms. Slusarczyk 6 hours to drive 420 miles if she maintains the same speed without stopping.