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mina [271]
4 years ago
13

Round 51.54 to the nearest. whole number

Mathematics
2 answers:
adell [148]4 years ago
6 0
51.54 rounds up to 52, this is because 5 rounds up. your answer= 52
aleksandr82 [10.1K]4 years ago
5 0
51.54 rounded to the nearest whole number equals to 52. 

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The half-life of Radium-226 is 1590 years. If a sample contains 400 mg, how many mg will remain after 2000 years?
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We have been given that the half-life of Radium-226 is 1590 years and a sample contains 400 mg.

We will use half life formula to solve our given problem.

N(t)=N_0*(\frac{1}{2})^{\frac{t}{t/2}, where N(t)= Final amount after t years, N_0= Original amount, t/2= half life in years.

Now let us substitute our given values in half-life formula.

N(2000)=400*(\frac{1}{2})^{\frac{2000}{1590}

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