Answer
525 in$^2$
Work Step by Step
A=$\frac{1}{2}$h(b$_1$+b$_2$)
A=$\frac{1}{2}$(15)(30+40)
A=$\frac{1}{2}$(15)(70)
A=$\frac{1}{2}$(1050)
A=525 in$^2$
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