Question

The city of Arachna has a spider population that has been doubling every year. If there are about 100,000 spiders this year, how many will there be 2 years from

now?

A:200,000
B:400,000
C:800,000
D:1,600,000

Answer 1

B: 400,000

Present date- 100,000

In 1 year- 100,000*2 = 200,000
In 2 years- 200,000*2= 400,000

Answer 2

B: 400,000 Bbecause if it doubles every year the the first year it doubles will be 200,000 and then the second year will be 400,000