Jeremy is trying to save money for college. he saves half of the money he earns from his part-time job. he has set a goal to save enough money to pay for his dorm fees for his first year. these behaviors demonstrate that jeremy's cortex has matured.

prefrontal cortex

Explanation:

According to my research on studies conducted by various psychologists, I can say that based on the information provided within the question Jeremy's prefrontal cortex has matured. The prefrontal cortex is a part of the brain which is located in front of the frontal lobe. Its main function includes managing complex behaviors, including planning, and greatly contributing to personality development.

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hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.  

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.