Answer:
4x+28
Step-by-step explanation:
Lets take the hypothesis
<em>zα/2 </em>
<em>- zα/2 </em>
<em>α/2 = 0.10/2 = 0.05 </em>
<em>z(0.05) = 3.92 </em>
<em>-z(0.05) = -3.92 </em>
Iikij