The manufacturer of a medicine wants to test how a new 300-milligram capsule is released into the bloodstream. After a every half-hour, and the number of milligrams of the drug in the bloodstream is calculated. The results obtained are shown in the table.

Use 7 rectangles, each with height N (t) at the left endpoint and with width 0.5 hr, to estimate the area under the graph representing these data. Divide this area by 3.5 hr to estimate the average drug level over this time period.

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Time t (hr) Time t (hr) N(t) (mg) 178.3 113.9 56.2 19.3 N(t) (mg) 2.0 2.5 3.0 3.5 0.5 1.0 1.5 247.3 270.0 236.4 ㅇ8은 일