Answer:
The amount present in a sample of 401 grams after 25 years is 
Step-by-step explanation:
we have
A(t) -----> the amount, in grams, of polonium 210 present in a given sample
t -----> the time in years
we know that
To find out the amount present in a sample of 401 grams after 25 years, substitute the value of t=25 years in the equation and solve for A(t)
For t=25 years
Answer:
<h2>2,052.9587095355</h2>
Step-by-step explanation:
<h2 /><h2>If circumference is 2r × pi, them diameter is circlumference ÷ pi.</h2><h2 /><h2>6449.56 ÷ Pi = 2,052.9587095355</h2>
Answer:
Step-by-step explanation:
sadly there is no good reason..the teachers are also annoying...
Answer:
486÷27=-18
Step-by-step explanation:
you would divide 27 with numbers until you get -18
Answer:
4:7
Step-by-step explanation:
i don't think that you can simplify it any further so you just change the / to a :
