Final answer:
Tina finished her ride at Happy Trails at 3:24 PM. To find the time, we add 3 hours and 24 minutes to her start time of noon. The cost of the ride isn't calculated due to missing rate information, but the correct ending time is indicated in options a and b.
Step-by-step explanation:
To determine when Tina completed her ride at Happy Trails and how much it cost, we start by adding the duration of her ride to the time she started. Tina began her ride at noon, which is 12:00 PM. She rode for 3.4 hours, which is equivalent to 3 hours and 24 minutes (since 0.4 hours times 60 minutes per hour equals 24 minutes). We add 3 hours and 24 minutes to 12:00 PM: 12:00 PM + 3 hours = 3:00 PM, 3:00 PM + 24 minutes = 3:24 PM. Thus, Tina finished her ride at 3:24 PM. As for the cost, there's missing information regarding the rate per hour or if there's a flat fee. Without that, we're unable to calculate the cost of her ride. However, based on the provided options, we can choose the correct finish time which is of primary importance. The correct answer is either option a or b since both indicate the correct finish time of 3:24 PM.