#### Answer

$0.035$

#### Work Step by Step

We are given the formula:
$BAC=number~of~oz\times\%~alcohol\times 0.075\div body~weight~in~lb-hr~of~drinking~\times 0.015$
We plug in the values given:
$=36\times 4.0\times 0.075\div 135-3\times 0.015$
We solve using the order of operations:
$=36\times 4.0\times 0.075\div 135-3\times 0.015$
First multiply:
$=144\times 0.075\div 135-3\times 0.015$
Multiply again:
$=10.8\div 135-3\times 0.015$
Divide:
$=0.08-3\times 0.015$
Multiply:
$=0.08-0.015$
And subtract:
$=0.035$