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liq [111]
3 years ago
9

How do I solve this question

Mathematics
1 answer:
bazaltina [42]3 years ago
3 0

Answer: C

<u>Step-by-step explanation:</u>

S = \frac{a}{1-r}

a = 80, r = -\frac{1}{4}

S = \frac{80}{1-(-\frac{1}{4})}

  = \frac{80}{\frac{5}{4}}

  = \frac{80*4}{5}

  = 64

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