Linear growth

Question

a.
is characterized by a rapidly growing population.
b.
is demonstrated by the sequence 12, 13, 14, 15, 16.
c.
is illustrated by the numbers 2, 4, 8, 16, 32.
d.
is characterized by resource use and consumption.
e.
is characterized by a slowly decreasing population.



If the world's population grew by 2% in 1998 and continued at that rate, how long would it take the Earth's population to double?
a.
20 years
b.
25 years
c.
30 years
d.
35 years
e.
40 years