The life expectancy of a circulating coin is 20 years. the life expectancy of a circulating dollar bill is only startfraction 1 over 20 endfraction as long. find the life expectancy of circulating paper money.

One year because 20 years is 20/20=1 10 years is 10/20=1/2 and five years is 5/20=1/4 etc.

Step-by-step explanation:

x = 25

step-by-step explanation:

a^2+b^2=c^2

7^2+24^2=c^2

49+576=625

sqrt625=25

x=25

20

step-by-step explanation: