Question

The half-life of silver-105 is approximately 41.3 days.

Step 2 of 3 : How much of a 2 gram sample of silver-105 would remain after 86 days? Round to three decimal places.

___________________ grams

Answer 1

using the equation from part 1

A(t) = A0 * a^t, where we calculated a = 0.983357

A0 is 2 grams
t is 86 days

so plugging things in: A(t) = 2 * 0.983357^86

Answer 2

0.47227436

Answer 3

good, but since it says to round to 3 decimal places, just 0.472

Answer 4

okay