Plugging in .999c for v and 2.8 x 10^(-8), physics homework help

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

 
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