Answer
$P(5~heads)=\frac{1}{32}=0.03125$
Work Step by Step
$P(head)=\frac{1}{2}=0.5$
Now, using the Multiplication Rule. See page 282.
$P(5~heads)=$
$P(heads~on~Flip~1~and~heads~on~Flip~2~and~heads~on~Flip~3~
\\and~heads~on~Flip~4~and~heads~on~Flip~5) =$
$P(heads~on~Flip~1)\times P(heads~on~Flip~2)\times P(heads~on~Flip~3)\times P(heads~on~Flip~4)\times P(heads~on~Flip~5)=[P(heads)]^{5}=(\frac{1}{2})^{5}=\frac{1}{32}=0.03125$
