Always, because esimates are guesses and when you guess you dont know whether it's correct or not.
msnshsjsbs
Scientists must rely on estimates when they cannot obtain exact numbers.
no. he did become a sientist and i think u have to like and be good at math to be a sientist
No.
mycocgist
ben franklin
A physicist
sientist
Scientist often rely the math skill of estimates when they cannot find the exact number.
Scientists must sometimes rely on estimates when they cannot obtain exact numbers :)
girls
a hyrdologist