Carlos has taken an initial dose of a prescription medication. The relationship between the elapsed time t, in hours, since he took the first dose, and the amount of medication, M(t) in milligrams (mg) in his bloodstream is modeled by the following function.
M(t)=20 x e^-0.8t
In how many hours will Carlos have 1 milligram of medication remaining in his bloodstream?
Round your answer, if necessary, to the nearest hundredth.

the correct answer is 1: 2

step-by-step explanation:

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first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: