Question 1006210
{{{ N(t) = 1200*2^t }}}
(a)
{{{ t = 0 }}} hrs
{{{ N(0) = 1200*2^0 }}}
{{{ N(0) = 1200*1 }}}
( any number raised to the zero power  = 1 )
{{{ N(0) = 1200 }}}
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(b)
{{{ t = 5 }}} hrs
{{{ N(5) = 1200*2^5 }}}
{{{ N(5) = 1200*32 }}}
{{{ N(5) = 38400 }}}