You might faint due to the lack of energy and nutrients that your body require to function
I know this is scary....
They're acknowledging the fear that the patient has and are also communicating hope by being positive.
6mg per Kg
115 lb = 52.16kg
if 6 mg per 1 kg, to find for 52.16 kg, you multiply by 52.16 = 312.9mg
SO for 115 lb person = 312.9 mg
It will be Josh who gets his target THR. His range is within 135 bpm—175 bpm while the actual heart rate was 165 bpm, deducting it with 20 bpm results to 145 bpm - falling to the 135 bpm—175 bpm THR range. Although doing the same method as Josh's results to 165 bpm for Dominique, it doesn't fall to his 150 bpm—183 bpm THR range.
I would say that if she is being mean you can first try to talk it out with her (because relationships may take work sometimes and if she is really important both of you will be willing to put in the work), but if that doesn't go well and you really don't think it is going to work you should go to your other friends or family for support especially if she was a very important part of your life.