Answer:
Step-by-step explanation:
The different isotopes have different "half-lives" – the time it takes to lose half of its radioactivity. Pu-239 has a half-life of 24,100 years and Pu-241's half-life is 14.4 years. Substances with shorter half-lives decay more quickly than those with longer half-lives, so they emit more energetic radioactivity.
Since it's 10 to the 2nd power, you just move the decimal places 2 places to the right.
So the answer is 3460
Answer:
12.5 sec
Step-by-step explanation:
distance = speed x time
distance / speed = time
100/8 = 12.5
12.5seconds
hope this helps
brainliest plz?
x
Answer:
Step-by-step explanation:
First, divide each persons rate by the number of minutes they typed their words in .
you end up with:
Damian: 55 seconds
Howard: 26 seconds
This tells us that Howard was least and <u>Damian was greater. </u>
Hope this helps :)
