You are given 175 grams of a substance with a half-life of 0.25 years. How much time has passed if you now have 21.88 grams? Can someone please help me with this question? I don't understand anything about half life.

Question

ookawaiioo · Answer

God has sent me to help you.

jfraser · Answer

if you started with 175g of this radioactive substance, how much will decay over one half-life?

anonymous · Answer

I have no idea :( I don't understand half-life at all. What would the equation be for me to figure that out? @Jfraser @oOkawaiiOo

jfraser · Answer

it's a HALF- life. What percentage, or fraction, of a substance decays over one HALF-life?

You don't need a complicated equation for this, at least not yet.