Answer:
Step-by-step explanation:
As an example, iodine-131 is a radioisotope with a half-life of 8 days. It decays by beta particle emission into xenon-131. After eight days have passed, half of the atoms of any sample of iodine-131 will have decayed, and the sample will now be 50% iodine-131 and 50% xenon-131.
50 grams to 25 grams is one half-life. 25 grams to 12.5 grams is another half-life. So, for 50 grams to decay to 12.5 grams, two half-lives, which would take 36 days total, would need to pass. This means each half-life for element X is 18 days.
This a triangle worth committing to memory The angles are 90-60-30 and the sides are in the ratio 2:sqrt3 : 1 where 1 is the shortest side opposite the 30 degree angle,
So v : 16 = 1 : 2 giving v = 8
and u : v = u : 8 = sqrt3 : 1 giving u = 8 sqrt 3
Its a
Answer:
(6, -4)? is this on khan academy or smth
Step-by-step explanation:
Answer:
mean-175.5
median-18
mode-18
range-11
Step-by-step explanation:
Answer: 3.905 rounded
Step-by-step explanation: The thousandth in this number is 4.
Round it up since when its 5 or more you add 1 more/raise the score
The answer is 3.905
