The amount y (in grams) of the radioactive isotope phosphorus-32 remaining after t days is y = a(0.5) ^t/9, where a is the initial amount (in grams). What percent of the phosphorus-32 decays each day?

Explanation is in the file

cutt.ly/zxt1ipy

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2