Question 911409

{{{900* 2^t }}}

 That should work. You agree that after {{{1}}} hour it would have {{{doubled}}}, {{{2}}} hours {{{quadrupled}}}, {{{3}}} hours increased {{{8}}} times, etc: 

 {{{2^1 = 2 }}}
 {{{2^2 = 4 }}}
{{{ 2^3 = 8 }}}
:
:


so, {{{900* 2^t }}} ...plug in given values for {{{t}}}

after {{{1}}} hour it would have {{{900* 2^1=900*2=1800 }}}

after {{{2}}} hour it would have {{{900* 2^2=900*4=3600 }}}

after {{{3}}} hour it would have {{{900* 2^3=900*8=7200 }}}

after {{{5}}} hour it would have {{{900* 2^5=900*32=28800 }}}