Please answer the following question and show me the steps you took to receive the answer, thanks so much! I need this asap.
An elementary particle called pion has an average lifetime of 2.8 x 10^-8 s when at rest. If a pion moves with a speed of 0.999 c relative to the earth find:
A- the average lifetime of the pion as measured by an observer on earth
B- the average distance traveled by the pion as measured by an observer on earth