2 years ago

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

1 answer:

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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