Question

Help no weird files, please!

Answer 1

10,000 * (0.5)^x/19 ; 19.53125

Explanation:

Sorry, Im not good at chemistry, but I think this is how you do it.

Part 1: 10,000 * (0.5)^x/19 x=time

Part 2: 10,000 * (0.5)^171/19 = 10,000 *(0.5)^9 = 19.53125