Answer the Question with an Algebraic Expression $( y + f ) \text { in }$

Multiple Choice

Answer the question with an algebraic expression. The perimeter of a rectangle is y yards and f feet. What is the perimeter in inches?

A) $( y + f ) \text { in }$ .
B) $( 36 y + 12 f ) \text { in }$ .
C) $( 12 y + 36 f ) \text { in }$
D) $( y - f ) \text { in }$ .
E) none of these