<P> The doubling time is the period of time required for a quantity to double in size or value . It is applied to population growth , inflation , resource extraction , consumption of goods , compound interest , the volume of malignant tumours , and many other things that tend to grow over time . When the relative growth rate ( not the absolute growth rate ) is constant , the quantity undergoes exponential growth and has a constant doubling time or period , which can be calculated directly from the growth rate . </P>
<P> The doubling time is the period of time required for a quantity to double in size or value . It is applied to population growth , inflation , resource extraction , consumption of goods , compound interest , the volume of malignant tumours , and many other things that tend to grow over time . When the relative growth rate ( not the absolute growth rate ) is constant , the quantity undergoes exponential growth and has a constant doubling time or period , which can be calculated directly from the growth rate . </P>
the doubling time for the u.s. population in years is
the doubling time for the u.s. population in years is
is the period of time required for a quantity to double in size or value . It is applied to population growth , inflation , resource extraction , consumption of goods , compound interest , the volume of malignant tumours , and many other things that tend to grow over time
is the period of time required for a quantity to double in size or value . It is applied to population growth , inflation , resource extraction , consumption of goods , compound interest , the volume of malignant tumours , and many other things that tend to grow over time