[tex]33 + \frac{3}{8}w \: and \: if \: w \: = - \frac{1}{2} \\ so \: = 33 + \frac{3}{8} \times - \frac{1}{2} \\ = 33 + ( - \frac{3}{16} ) \\ = 33 - \frac{3}{16} \\ = \frac{528 - 3}{16} \\ \ = \frac{525}{16} \\ = 32.8125(ans)[/tex]
