Sample of radioactive element is it half-life of 3.0 days. It's 2.0 kg of the same several remains unchanged after 9.0 days, what was the initial mass of the sample question

How are farmers that use no plow farming methods able to improve air quality for the people around the fram

Where would you be most likely to find a freshet?

Anight-club bouncer, now a top official,put coke or pepsi in it; first three initial. combine all lakes; but i still have more,of all the places; i have the largest shore.what am i? ?