Let x be the number of square feet to be mowed
215 square feet take 22 minutes
x square feet take 12 minutes
215 square feet take 22 minutes
x square feet take 12 minutes
Solve negative four and one fifth ÷ two and one fourth.
1 answer:
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Answer:
8978 grams
Step-by-step explanation:
The equation to find the half-life is:
N(t) = amount after the time <em>t</em>
= initial amount of substance
t = time
It is known that after a half-life there will be twice less of a substance than what it intially was. So, we can get a simplified equation that looks like this, in terms of half-lives.
or more simply
= time of the half-life
We know that = 35,912, t = 14,680, and
=7,340
Plug these into the equation:
Using a calculator we get:
N(t) = 8978
Therefore, after 14,680 years 8,978 grams of thorium will be left.
Hope this helps!! Ask questions if you need!!
Answer:
The variance is 53.29 kg²
Step-by-step explanation:
The standard deviation is the square root of the variance.
So
In which problem, we have that:
So
The variance is 53.29 kg²