Answer:
A = 30 ft^2
Explanation:
The area of a trapezoid is found by
A = 1/2 (a1+a2)h
where a1 is the top of the trapezoid and a2 is the bottom of the trapezoid
a1=3 a2=12 h=4
A = 1/2(3+12)*4
A = 1/2 (15)4
A = 1/2(60)
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