Any math experts that can validate this (Just like the old school questions)?

A mile has 5,280 feet, and an hour has 3,600 seconds, so 60 miles per hour is:
60 x 5,280 / 3,600 = 88 fps
(60 mph = 88 fps )

How to determine how many seconds from your destination you are (example driving in a car and you are 1500' from your next turn):

1. Determine distance to travel (1500 feet)
2. Determine speed
3. Determine feet per second
4. Determine how many seconds from the destination you are

Let’s say you are 1500 feet from your turn and you are going 30 mph. You want to be notified 7 seconds from the turn.
30 x 5280 / 3600 = 44 feet per second
1500 feet / 44 feet per second = you are 34.090909 seconds from the turn

I can process this every second until I am 7 seconds out. Is that the best method (assuming you could speed up or slow down it would need to be checked/computed every second)

Looks right to me, but can anyone verify that is accurate?