Scientists measure a bacteria population and find that it is 2,700. Three days later, they find that the population has doubled. Write a function f(d) that could describe the bacteria population d days after the scientists first measured it, assuming it grows exponentially?
There was a sample of
300
milligrams of a radioactive substance to start a study. Since then, the sample has decayed by
2.3%
each year.
Let
t
be the number of years since the start of the study. Let
y
be the mass of the sample in milligrams.
Write an exponential function showing the relationship between
y
and
t
.
Determine whether the function represents exponential growth or exponential decay. Identify the percent rate of change.
Without graphing, determine whether the function
Determine whether each function is an example of exponential growth or decay. Then, find the y-intercept.
For the following exercises, determine whether the equation represents exponential growth, exponential decay, or neither. Explain.