Question

If the population of an ant hill doubles every 10 days and there are currently 30 ants living in the ant hill, what will the ant hill population be in 40 days?

a.)960 ants

b.)240 ants

c.)480 ants

d.)810,000 ants

Answer 1

10th day -> 30x2 = 60
20th day -> 60x2 = 120
30th day -> 120x2 = 240
40th day -> 240x2 = 480

or can be written as :
30 x 2^4 = 30x16 = 480