In an exponential model, what is the time taken for a quantity to double called?

1. Exponential growth multiplies a quantity by the same factor over equal time steps. 2. The length of time in which the quantity doubles is called the doubling time. 3. It is found by solving 2 times the starting amount equal to the starting amount times e to the power kt. _Source: OpenStax Precalculus (CC BY 4.0), section 4.7 Exponential and Logarithmic Models_