Question

the life expectancy of a circulating coin is 30 years. the life expectancy of a circulating dollar bill is only 1/20 as long. find the life expectancy of circulating paper money. Life expectancy= how many years ( type a whole number or a mixed number simplify your answer)

Answer 1

Given

the life expectancy of a circulating coin is 30 years

the life expectancy of a circulating dollar bill is only 1/20 as long.

Procedure

c=life expectancy of a circulating coin

p= life expectancy of circulating paper money

`p=(1)/(20)\cdot c`
`\begin{gathered} p=(1)/(20)\cdot30 \\ p=(30)/(20) \\ p=1.5 \end{gathered}`

The answer is: life expectancy of a dollar bill = 1.5 years