Evaluate s5 for 400 + 200 + 100 + … and select the correct answer below.

The correct answer is B. 775

Complete the question and statement:

Evaluate S5 for 400 + 200 + 100 + … and select the correct answer below.

A) 25

B) 775

C) 1125

D) 500

Source: Previous question that can be found at

Explanation:

This is a series of 5 terms, which first term is 400 and start decreasing by the half of the previous term. We're being asked for find the 5 terms and the sum of those 5 terms.

1. Let's five the 5 terms:

400, 200, 100, 50 and 25.

2. Let's five the sum of those 5 terms:

Sum = 400 + 200 + 100 + 50 + 25

Sum = 775

The correct answer is B. 775

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