Beryllium (symbol Bc) is a steel-gray coloured alkaline earth metal that exists

Question

Beryllium (symbol Bc) is a steel-gray coloured alkaline earth metal that exists in a number of isotopes. One such isotope is beryllium-8: this isotope decays according to the equation: N(t) = N_0 e^-(1.0 times 10^16)t where N is the number of ^8 Be nuclei present in a sample at a given time t (measured in seconds) and N_0 is the number of ^8 Be nuclei present in the same sample at some reference time t = 0. What is the half-life of ^8 Be in seconds? (In other words, how long does it take the initial N_0 ^8 Be nuclei to decay to 1/2 N_0 ^8 Be nuclei?) Half-life = seconds (to 2 significant figures.) Note that you may have to input your solution using Maple's syntax for scientific notation. For example, to input 1.23 times 10^-6 using Maple's syntax, enter 1.23e-6: or to input 1.24 times 10^7, you should type 1.24e7. (This is similar syntax to the output on some scientific calculators.)

Explanation / Answer

1,30 seconds

squart/exp/abs=square root /e -exponential / absolute value

trunc /round/ floor /ceil =trunc /round / floor/ceill

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