On a sertain moment the longest officially verified human live span was attained by the Japanees man Shigechiyo Izumi, who died in 1986 at the age of 120 years and 237 days.
Express his live in seconds?
How many sifnificant figgures are there in your anwer and why?
One year is 365.24 days
One day is 24 60 60 seconds
# Calculations
years = 120
days = 237
total_days = 365.24 * years + days
total_seconds = total_days * 24 * 60 * 60
print(f'The man lived {total_seconds} sec')
As we do not know what time on his last day he passed away, so the uncertinity is one day or 24 60 60 sec
precision = 24 * 60 * 60
print(f'The uncertinity is {precision} sec')
So the number of significant figures is restricted to 5
print(f'The man lived {total_seconds:.4e} sec (scientific correct notation)')