Question

The half-life of radioactive radon gas is 3.8 days. How much of 100 mg of the gas will be left after 9 days?

23.4 mg
14.7 mg
19.4 mg
36.7 mg

Answer 1

how many times does 3.8 go into 9?

Answer 2

2.3 times

Answer 3

2.368 time, so its gonna split in half that many times

Answer 4

so im guessing we have 100*(1/2)^(2.368)

Answer 5

I get 10547.77

Answer 6

then you did something wrong lol

Answer 7

lemme try again

Answer 8

Ohh Okay I got 19.4 mg messed up my order of operations

Answer 9

thats better :)

Answer 10

Thank you!

Answer 11

yep