Answer:

Step-by-step explanation:


Compute general progression:




nth term is computed by:

plug in the values
:


Answer:
b
Step-by-step explanation:
Answer:
D) 
Step-by-step explanation:
Given: 
Use Exponent Rule: 
Use Addition Rule: 
Because it says it’s looking for the ESTIMATED sum. Round your answer to the nearest tenth, and that would be an estimated answer.