Interpret complex expressions by treating meaningful sub-expressions as single units.
Interpret a nested expression from the inside out
Problem
For \(1.08(40+5n)\), where \(40+5n\) is a pre-tax dollar subtotal, identify inner quantity/formula/unit and outer operation/multiplier/result unit.
Big Picture
What this problem is really about
A nested expression is most reliable when read from the inside out. We’ll treat the parenthesized terms as one complete pre-tax subtotal, confirm their common dollar unit, and then interpret the outside multiplier by separating the whole amount from the added rate. Its placement shows that the same adjustment applies to every term in the subtotal.
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