Question

PreCalc help with sums. I will mark brainliest. (also can you explain WHY you got what answer you got? Thanks)

Answer 1

Answer:

5.25

Step-by-step explanation:

a = 4.2

r = 1/5 = 0.2

Sum to infinity:

a/(1 - r)

4.2/(1 - 0.2)

4.2/0.8

21/4

5.25