What is the value of a3 in the sequence? 5, 10, 20, 40, 

 20

Step-by-step explanation:

Given the sequence {5, 10, 20, 40, 80, ... }

the first term (a₁) is 5

the second term (a₂) is 10

the third term (a₃) is 20

the fourth term (a₄) is 40

the fifth term (a₅) is 80

= 20

Step-by-step explanation:

The first term in the sequence = 5

the second term = 10

the third term = 20

the fourth term = 40 and the fifth term = 80

In general the terms in the sequence can be denoted by

where n represents the position of the term in the sequence

denotes the first term

denotes the second term

denotes the third term and so on

Here = 20

c-4 is the final answer! : )