Question
Bismuth210 has a halflife of 5.0 days.

A sample originally has a mass of 800 mg. Find a formula for the mass remaining after t days.
y(t) = `800e^(ln(2)/5 t)`

Find the mass remaining after days.
mg

When is the mass reduced to 1 mg?
days

Sketch the graph of the mass function. (Do this on paper. Your teacher may ask you to turn in this work.)