Answer:

Step-by-step explanation:
Pacey's computer is infected with a virus. The number of files the virus corrupts doubles every 8 minutes.
That means at every 8 minutes interval sequence becomes 8, 8 × 2, 8 × 2 × 2,.....
So the sequence is a geometric sequence.
Explicit formula of geometric sequence is

When
= xth term
= first term
x = number of term
and r = common ratio
Here
= 8 and r =
= 2
So expression representing the number of files corrupted will be
= 