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
B. Two different sperm both fertilizing the same egg
Two different sperm both fertilizing the same egg
sorry I dont know what to do for the chart
B
