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Anika [276]
3 years ago
5

The life expectancy of a circulating coin is 30 years. The life expectancy of a circulating dollar bill is only

Mathematics
1 answer:
Afina-wow [57]3 years ago
3 0
Life expectancy of dollar bill = d
life expectancy of coin = c

d = 1/20 c

substitute value in for c (30)

d = 1/20 * 30
d = 30/20
d = 1.5

life expectancy of a dollar bill = 1.5 years
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<u>Answer-</u>

\boxed{\boxed{f(n)=0.8(f(n-1))+10,\ f(0)=150,\ \ n>0}}

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