My bad. In my unschooled approach I was under the impression the units were in tenths of an hour. that negative one exponent through me off. What is your take on the negative one exponent?
There is no "take" to have. "h
-1" means 1/h, i.e. "per hour", as in the common units km h
-1 (kilometres per hour), or m s
-1 (metres per second), or even just s
-1 (per second, better known as hertz).
I don't see how you could possibly interpret "h
-1" as indicating "tenths of an hour".
Honestly, if you get thrown by simple everyday unit conventions, then what are the chances that your calculations are correct and the rest of the world's are wrong?