0
Definition: Exponential decay refers to an amount of substance decreasing exponentially. Exponential decay is a type of exponential function where instead of having a variable in the base of the function, it is in the exponent.
The best known examples of exponential decay involves radioactive materials such as uranium or plutonium. Another example, if inflation is making prices rise by 3% per year, then the value of a $1 bill is falling or exponentially decaying, by 3% per year.
new value=initial value x (1-r)^t where t =time and r =rate/100
Example: China's One-Child Policy was implemented in 1978 with a goal of reducing China's population to 700 million by 2050. China's 2000 population is about 1.2 billion. Suppose that China's population declines at a rate of 0.5% per year. Will this rate be sufficient to meet the original goal?
plug in the numbers for the equation: new value=1.2billionx(1-0.005)^50
new value=0.93 billion
hope this helps! Please check out more exponential decay examples in the links! =)
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
What are the applications of logarithmic and exponential functions in real life?
I am both a Mechanical and an Electrical engineer ( aka use math in real life every day) and I work every day with systems described by exponential or logarithmic functions.Just to name a few:Charging or discharging of a capacitorAny LRC circuit (or any combination thereof)Any SMD system (or any combination thereof)radioactive decayalgorithmic efficiencyIn other words, if you want to describe a real life you will probably encounter some exponential function. This comes from the fact that the solution to differential equations ( which govern most of the universe) generally contain an exponential term.
What is the relationship between a math term and a math expression?
A math expression is a collection of math terms
Is area always squared in math?
Yes, area is always squared in math. I know this because I asked my math teacher ( who is the best math teacher ever!)
What is a variable in math?
What is a Variable in Math?A variable in math is part of algebra and it is a symbol or letter that represents a number.
What is a math unit bar?
bar modeling is math
What does exponential form mean in math terms?
A number is in exponential form when it is written with a base and an exponent.
What should you include in a paper about Logarithms?
you should include the definition of logarithms how to solve logarithmic equations how they are used in applications of math and everyday life how to graph logarithms explain how logarithms are the inverses of exponential how to graph exponentials importance of exponential functions(growth and decay ex.) pandemics, population)
What is exponential from?
Exponential form is when math is explained in steps. The formula for this would be A=P(1+R)to the power of T.
Why do isotopes decay at an exponential rather than a linear rate?
Popular physicists are liable to go into "spontaneous symmetry breaking." The truth is that standard physical models are often just math without genuine physics. Until now, we have not been able to explain exponential decay so much as describe it. But I believe I have cracked the code. See the included link.I really believe I have an original answer, and I want to make it known.
What is the math connection with decomposition?
The math is exponential functions and continues half life. The formula is f(t)=a*e^(kt). You would need to find out the decay rate of the carbon 14 found in living tissue. A is how much C-14 you start with and t is the time. K is the rate which comes from the formula F(x)=a*b^x. B=R-1. R is the percent of decay. Ln(b)=k
What is a good sentence for decay?
"Growth and decay will be the topics covered in our math class next week."
What does decay factor means in math terms?
leave
What is the exponential of 90?
The exponential form, or exponential equation, of 90 is 21 x 32 x 51 . Exponentials help someone determine what numbers and factors are multiplied together to get a the number you are looking for in math.
What does exponential notation in math means?
It means in powers as for example 5*5*5 in exponential notation is 5^3 which means 5 to the power of 3
In math what does an exponential expression mean?
It means that the variable of interest appears as a power in the expression. So, for example, 3x is exponential but x3 is merely cubic. The distinction depends on the position of x.
What kind of distribution is exponential distribution?
Exponential distribution is a function of probability theory and statistics. This kind of distribution deals with continuous probability distributions and is part of the continuous analogue of the geometric distribution in math.
What math book did Rudiger Gamm learn math from?
He memorized tables of functions, exponential functions, logarithmic functions, etc, ... try looking up "handbook of mathematical functions"
