Answer:
Rn-222
Step-by-step explanation:
this decay takes specified step therefore Rn-222is not a decaying process
To find their mph you would have to divide by 2 to find out how much they got in 1 hour instead of 2. You would have to do 4 2/3 / 2. An easier way to do this is just doing 14/3 x 1/2 which is the same thing except making 4 2/3 a fraction and changing divided by 2 to multiply 1/2. The answer you would get is 14/6, which is 2 1/3 miles per hour. To do this quickly you could just look at the question and divide 4 by 2 to get 2 and then divide 2/3 by 2 to get 1/3 and then add them up.
Hope this helps!
Answer:
6/25
Step-by-step explanation:
6 numbers (from 1 - 25) are less than 7. There are 25 numbers in total. This makes the probability 6/25.
If the half-life is t, then every t days, the amount of the radioactive isotope will be cut in half.
(1/2)^(number of half-lives) = 3%
number of half-lives = ln(0.03) / ln(0.5)
This gives the number of half-lives as 5.06.
Then 300 days = (5.06)(length of 1 half-life)
length of 1 half-life = 300 / 5.06 = 59.29 days
Answer:
Your answer is B) 3.6 cm.
Step-by-step explanation:
10 mm = 1 cm. To convert 36 mm to cm all you have to do is divide by 10.
36/10 = 3.6
So, 36 mm = 3.6 cm.
In the future, if you were to convert cm to mm, just multiply by 10.
