# Question #7edac

##### 1 Answer

#### Answer:

#### Explanation:

Use this **exponential decay** equation:

Here

#y = 100(b)^(x/8) -># You divide#x# by#8# because the half-life is every#8# years

#y = 100(1/2)^(x/8)#

#y = 100(1/2)^(32/8) => y = "6.25 g remaining"#