N = N_{0} 2^{\frac{- t}{T_{1 / 2}}}

${N = N_0 2^\frac {- t} {T_ {1/2}}}$

N = N_{0} 2^{\frac{- t}{T_{1 / 2}}}

${N = N_0 2^\frac{-t} {T_{1/2}}}$

N

$N$

N_{0}

$N_0$

N_{0}

$N_0$

300

t

$t$

s

$s$

5

T_{1 / 2}

$T_ {1/2}$

s

$s$

5

Lisa

OK

Error