e answer obtained in part c by 81, This yalue will represent or the job. Show work below.
How much concrete is needed for the job? \( \qquad \)
n awning will be placed above the patio. The awning will be in the shape of a trapezoid. The , of the trapezoid is half the width of the patio. \( B_{1} \) is the length of the patio. \( B_{2} \) is 4 feet shorte he length of the patio. How much fabric is needed for the awning? If your answer is a decima round to two decimal places. Replace the "?" with the appropriate values in the formula that fo
\( h= \) width of patio \( \div 2 \)
\( b_{1}= \) length of patio
\( b_{2}= \) length of patio -4
\[
\begin{array}{c}
A=1 / 2 h\left(b_{1}+b_{2}\right) \\
A=1 / 2(?)(?+?) \\
A=1 / 2(?)(?) \\
A=1 / 2(?) \\
A=? \mathrm{ft}^{2}
\end{array}
\]