You have 80 grams of a radioactive kind of europium. If its half-life is 9 years, how much will be left after 27 years?

9514 1404 393

  10 g

Step-by-step explanation:

27 years is 3 times the 9-year half-life. This means the quantity remaining has been cut in half 3 times:

  ((80×1/2)×1/2)×1/2 = 10 . . . . grams

the answer is 10g

Step-by-step explanation:

:

mean, 40.6

step-by-step explanation:

for a it would be 24 children.

for b i don't understand the question. is it saying for each individual person they pick 5 reds to 7 greens or is it the whole group. clarify and i hope this can you.

step-by-step explanation: