Answer:
Radiation is energy that comes from a source and travels through space at the speed of light.
Answer: 20 mg Te-99 remains after 12 hours.
Explanation: N(t) = N(0)*(1/2)^(t/t1/2)
N(t) = (80 mg)*(0.5)^(12/6)
N(t) = 20 mg remains after 12 hours
Answer:
I am not really sure, but I think Fr.
Explanation:
Answer:
turtle
Explanation:
they are slow and they take there time
