Question 1154557
{{{ h(t) = -.5t + c }}}
You are given the point:
( 18, 15 )
{{{ 15 = -.5*18 + c }}}
{{{ 15 = -9 + c }}}
{{{ c = 24 }}}
The equation is:
{{{ h(t) = -.5t + 24 }}}
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After 15 hrs:
{{{ h(15) = -.5*17 + 24 }}}
{{{ h(15) = -8.5 + 24 }}}
{{{ h(15) = 15.5 }}}
'--------------------
check:
( 18,15 )
{{{ h(t) = -.5t + 24 }}}
{{{ 15 = -.5*18 + 24 }}}
{{{ 15 = -9 + 24 }}}
{{{ 15 = 15 }}}
OK