4) Ty runs his own landscaping business. He earns \( \$ 30 \) per hour pulling weeds, \( \$ 25 \) per hour raking leaves, and \( \$ 20 \) per hour cutting the grass. Ty wants to know how much he earns each week.
4) Which expression represents the total amount Ty earns for \( p \) hours pulling weeds, \( r \) hours raking leaves, and \( c \) hours cutting the grass?
\[
30 p \cdot 25 r \cdot 20 c \quad 30 p-25 r-20 c \quad 30 p+25 r+20 c \quad 30+25+20
\]

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