A normal random variable x has an unknown mean 
and a standard deviation 
. If the probability that x exceeds 7.5 is 0.8289, find 
Definitions:
Osteosarcoma
A type of bone cancer that begins in the cells that form bones, most commonly occurring in teenagers and young adults.
Bone Marrow Transplantation
A medical procedure that replaces damaged or diseased bone marrow with healthy bone marrow stem cells.
Intensive Irradiation
A high-dose radiation therapy aimed at treating certain cancers or other pathological conditions by killing or damaging the targeted cells.
Ventilator-Dependent
A condition wherein a person requires the assistance of a mechanical ventilator to breathe.
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