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9 July, 16:00

Molly is making a sign in the shape of a trapezoid. One base is 18 inches and the other is 30 inches. How high must she make the sign so its area is 504 square inches?

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  1. 9 July, 17:32
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    The area of the trapezoid is calculated through the equation,

    A = ((b₁ + b₂) / 2) x h

    where b₁ and b₂ are the bases and h is the height. Substituting the known values from the given above,

    504 = ((18 + 30) / 2) x h

    The value of h from the equation is 21. Thus, Molly must make the trapezoid 21 inches high.
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