Jean traveled the first 100 miles in 5 hours. Then she doubled her speed for the last part
of the trip. If the total trip was 300 miles, how many hours did it take Jean to travel the
last part?

Time taken to travel the last part by Jean is 5 hours.

Step-by-step explanation:

Step 1: Given the total distance = 300 miles. Part 1 distance = 100 miles and time = 5 hours. Find speed for the first part.

⇒ Speed = Distance/Time = 100/5 = 20 miles/hour

Step 2: Find the speed of the second part given that she doubled her speed.

⇒ Speed for second part = 2 × 20 = 40 miles/hour

Step 3: Find the time taken to cover the last part by using the speed formula used above.

⇒ Time = Distance/Speed = 200/40 = 5 hours

Hello sorry can’t good luck tho

Iam not sure but i think the answer is b