my steering wheel and front part of the car tends to shake everytime i brake going over 70+ mph...
is this a brake problem or rotor?
is it covered under the warranty?
or is this just normal

 

It is a known problem with front rotors. You can get your rotors turned and put new pads on and hope it doesn't return for awhile or, get some aftermarket front rotors as I did.
If you are still under warranty, your dealer should turn the rotors and replace the pads at no cost.
JS

 

Why blame the brakes (as terrible as they are)? Balance your tires.