Math/Pre-calc, Doubling Time Question

Question

Complete the following table.

Population	Growth​ Rate, k	Doubling​ Time, T
Country A	1.61.6​%	x
Country B	x	3232

Answer 1

2= e^.016t

.016t = ln2

t= ln2/.016 = 43.322 years = doubling time for 1.6% per year increase for country A

2=e^32r

ln2 =32r

r = ln2/32 = .02166= 2.166% annual rate of increase for country B