Was this new or used? If it's new you should call Tesla immediately
Doubt if that will help. Tesla will just say it is normal, and car is performing as designed. UNLESS you are within the 7 day return window!
Keep track of the degradation using SMT or equal. fi it approaches 30% you MIGHT be able to make a warranty claim. probably either the degradation will stop at 10% or so and level off, or you will have a complete battery failure which is rare.
On the second point, what was the wh/mi consumption for the 175 mile trip? I'm guessing a lot more than 240. if so, it is driving habits and AC/heater use, and or Vampire Drain, ie sentry mode or overheat protection on.