Question

The following data is given:

 

t    10      20      30       40    

N  28.28  40    56.57   80

 

Which of the following numbers best describes the doubling time? (To answer the question you may draw a semi-log plot, i.e., plot logN against t, but may also be able to guess it by looking at the data.)

a) 10

b) -4

c) 20

d) 40

Answer 1

The graph is provided below