Or you can use it to find out how long it would take to get to a certain population or value on your house.

The diagram below shows exponential growth:: The exponential growth model describes the population of a city in the United States, in thousands, t years after 1994.

If I end up with a positive value, I'll know that I should go back and check my work.) In Its radiation is extremely low-energy, so the chance of mutation is very low.

(Whatever you're being treated for is the greater danger.) The half-life is just long enough for the doctors to have time to take their pictures.

For example, you may be given the values for Ao and t and you need to find the amount A after the given time.

Or, you may be given the final amount A and the initial amount Ao and you need to find the time t.

In this tutorial I will step you through how to solve problems that deal in exponential growth and decay.

These problems will require you to know how to evaluate exponential expressions and solve exponential equations. If the information for time is given in dates, you need to convert it to how much time has past since the initial time.

Carbon is naturally in all living organisms and is replenished in the tissues by eating other organisms or by breathing air that contains carbon.Carbon 14 is a common form of carbon which decays over time.The amount of Carbon 14 contained in a preserved plant is modeled by the equation $$ f(t) = 10e^.How am I supposed to figure out what the decay constant is?I can do this by working from the definition of "half-life": in the given amount of time (in this case, hours.