Respuesta :

the formula is

[tex]A=\frac{B+b}{2}\times h[/tex]

where

B = longer base

b = smaller base

h = height

then we solve

[tex]\begin{gathered} A=\frac{6+4}{2}\times3 \\ A=\frac{10}{2}\times3 \\ A=5\times3 \\ A=15 \end{gathered}[/tex]

answer: 15 square feet

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