Solve Exponential Decay Problems Practice Test - Math

The amount of phosphorus present in a sample at a given time is given by the following equation:

$Q(t)=Q_0e^{-0.03t}$

Where is in days, is the amount of phosphorus after days, and is the initial amount of phosphorus at the beginning of the first day. What percent of the initial amount of phosphorus is left after days of decay?

The exponential decay of an element is given by the following function:

$Q(t)=Q_0e^{-0.04223t}$

Where is the amount of the element left after days, and is the initial amount of the element. If there are kg of the element left after days, what was the initial amount of the element?

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The exponential decay of an element is given by the following function: Where is the amount of the element left after days, and is the initial amount of the element. If there are kg of the element left after days, what was the initial amount of the element?

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The exponential decay of an element is given by the following function:

$Q(t)=Q_0e^{-0.04223t}$

Where is the amount of the element left after days, and is the initial amount of the element. If there are kg of the element left after days, what was the initial amount of the element?