By properties of multiplication, the formula n=7lh can be rewritten as n=(7h)l.To solve for l in terms of n and h, divide both sides of the equation by the factor 7h. Solving this equation for l gives $l=n/{7h}.Choices A, B, and D are incorrect and may result from algebraic errors when rewriting the given equation. Choices A, B, and D are incorrect and may result from algebraic errors when rewriting the given equation.