Answer
$A(1)= 1.1$
$A(4)= .1375$
$A(8)= .00859375$
Work Step by Step
$A(1) = 1.1*(.5)^{n-1}$
$A(1) = 1.1*(.5)^{1-1}$
$A(1) = 1.1*(.5)^0$
$A(1) = 1.1*1=1.1$
$A(4) = 1.1*(.5)^{n-1}$
$A(4) = 1.1*(.5)^{4-1}$
$A(4) = 1.1*(.5)^3$
$A(4) = 1.1*.125=.1375$
$A(8) = 1.1*(.5)^{n-1}$
$A(8) = 1.1*(.5)^{8-1}$
$A(8) = 1.1*(.5)^7$
$A(8) = 1.1*.0078125= 0.00859375 $