The concentration of a certain drug injected into the bloodstream decreases by 20% each hour as the drug is eleminated from the body. The initial dose creates a concentration of 0.7 milligrams per milliliter. a. Write a function for the concentration of the drug in the bloodstream as a function of time. W(t)= ________?_________ b. The minimum safe concentration of the drug is 0.4 milligrams per milliliter. When should the second dose be administered? Answer exactly or round to 3 decimal places. Within ______?______ hours

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A: please comment if you need any clarification. if you find my answer useful please put thumbs up.…