Determine the integral number of divisions

Of course, the development of an adult organism from a zygote isn’t quite that simple. In aIDition, things can go awry with cell division – notably the transformation of normal cells into cancer cells that divide in an uncontrolled way. If a single cancer cell in a tissue of the human body divides once every day, how long will it take for that cell to produce a tumor 21 cm3 in volume? Assume that the original cell has a volume of 10-9 cm3, and determine the integral number of divisions that gives the closest result.

"Is this question part of your assignment? We can help"