Answer
(a) 33 in
(b) 9 ft
Work Step by Step
The given expression is $$p=3s$$
(a) The given length of s is 11 in. Substitute for s in the expression.
$p=3s=3(11)=33$ in.
(b) The given length of s is 3 ft. Substitute for s in the expression.
$p=3s=3(3)=9$ ft.