Question $25$

$4\mathrm{.}25$ pts

Which formula would you use to calculate the depth of the compression block, a$?$

$C_c=0\mathrm{.}85f_c^{\text{'}}{?}^{ab}$

$M_{\text{d}\text{e}\text{m}\text{a}\text{n}\text{d}}=(0\mathrm{.}85f_c^{\text{'}}ab)(d-\frac{a}{2})$

$f_y{A}_s=0\mathrm{.}85f_c^{\text{'}}ab$

$lo{n}_s=lo{n}_c(\frac{d-c}{c})$

Question $26$

$4\mathrm{.}25pts$

The depth of the compression block, $a,$ is $q,$ inches.