Answer:
Step-by-step explanation:
you divid and get 29
Answer:

Step-by-step explanation:
In order to convert kilometers to miles, we can use a formula, assuming
is miles and
is kilometers.
.
Since we know the kilometer reading (7), we can divide this by 1.609 to get our total miles.

Hope this helped!
Answer:
For cobalt-60, which has a half-life of 5.27 years, 50% remains after 5.27 years (one half-life), 25% remains after 10.54 years (two half-lives), 12.5% remains after 15.81 years (three half-lives), and so on.
Step-by-step explanation:
You can figue out the rest.