Question

How much of a radioactive kind of calcium will be left after 10 days if the half-life is 5 days

and you start with 64 grams?
Please help me thanks !

Answer 1

Answer: 16 g

Explanation:

We can solve this with the Radioactive Half Life Formula:

`A=A_(o).2^{(-t)/(h)}`

Where:

`A` is the final amount of radioactive calcium

`A_(o)=64 g` is the initial amount of radioactive calcium

`t=10 days` is the time elapsed

`h=5 days` is the half life of radioactive calcium

Solving with the given data:

`A=(64 g)2^{(-10 days)/(5 days)}`

`A=16 g` This is the amount of radioactive calcium left