Two cyclists leave a city at the same time, one going east and the other going west. the westbound cyclist bikes at 3 mph faster than the eastbound cyclist. if after 6 hours they are 162 miles apart, how fast is each cyclist riding?

if you can solve this, can you show your work and explain what i need to plug in where, and what equation i need to use? this is so confusing.

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e.g. 98.76543).