Answer:
24.75 years
Explanation:
62.5 is 1/4 of 500, which means that in 99 years it passed through four half-lifes. So, you divide 99 by four and you get that the half-life is 24.75 years. 25 years if it was rounded
The body can decide the nutrients it needs
seeks to help communities mitigate and adapt to climate change, as well as improve food security.
Answer:
A producing colored sparks in fireworks
C rusting in the presence of water and oxygen
these are the correct answers