Mathematics is perhaps the perfect training for any career in medicine, science, law or business. It teaches thorough thought, problem solving and originality. A doctor should know mathematics for example, in prescribing medicine. Each person weighs a dissimilar amount, meaning that medication for a person might be too strong or too weak for another patient. A doctor must calculate the proper dosage based on the patient's weight. You should focus on math as a means to help you do well in these other science classes.