Answer
a) 1101 feet for Enterprise class, 1092 feet for Nimitz class
b) 3.67 football fields
Work Step by Step
a)
Enterprise = $e$
Nimitz = $n$
$e+n=2193$
$e-n=9$
$e+n+(e-n)=2193+(9)$
$e+n+e-n=2202$
$2e=2202$
$2e/2=2202/2$
$e=1101$
$e-n=9$
$1101-n=9$
$1101-9-n+n=9-9+n$
$1092 = n$
b)
3 feet to a yard
$1101/3=367$ yards
$1092/3=364$ yards