Question 1135231
{{{ p(t) = 4t + c }}} ( integral of p'(t) )
At {{{ t=0 }}} and {{{ p = 450 }}}:
{{{ 450 = 4*0 + c }}}
{{{ c = 450 }}}
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{{{ p(t) = 4t + 450 }}}
For 1907, {{{ t=7 }}}
{{{ p(7) = 4*7 + 450 }}}
{{{ p(7) = 478 }}}
478 million in 1907