To rearrange the area formula for a trapezoid, \( A = \frac{1}{2} h (b_1 + b_2) \), to solve for \( h \), we can follow these steps:
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Multiply both sides by 2 to eliminate the fraction: \[ 2A = h(b_1 + b_2) \]
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Now, divide both sides by \((b_1 + b_2)\) to isolate \( h \): \[ h = \frac{2A}{b_1 + b_2} \]
Thus, the correct rearranged formula for \( h \) is: \[ h = \frac{2A}{b_1 + b_2} \]
So the correct answer is: h = (2A)/(b_{1} + b_{2}).