During his annual medical checkup, Byron is advised by his doctor to adopt a regimen of exercise, diet, and medication to lower his blood cholesterol level to 220 milligrams per deciliter (mg/dL). Suppose Byron finds that his cholesterol level t days after beginning the regimen is

a. What is Byron’s cholesterol level when he begins the regimen?

b. How many days N must Byron remain on the regimen to lower his cholesterol level to 220 mg/dL?

c. What was Byron’s average cholesterol level during the first 30 days of the regimen? What was the average level over the entire period 0 ≤ t ≤ N of the regimen?

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L(t) = 190 + 65e-0.003t