You need to clarify your problem better. The one before this is utter gibberish...Excuse me if I am wrong but I can't make no sense of your questions.
How long does each node transmit for in every hour? Express your answer in seconds.
33 ms = 33 x 10-3 s = 0.033 s
So, the duty cycle is (0.033 s ÷ T s) x 100% = 3%
Transposing the formula gives T s =
1 hour : 60 *60= 3 600