- Math Probability help How do I solve these two problems and what are the answers please.?

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HELP!HELP! Is the right hemisphere of a split brain patient conscious? Write balanced half-reactions for the following redox reaction:
4Zn+2(aq)+AsH3(g)+4H2O(l)→ 4Zn(s)+H3AsO4(aq)+8H+(aq)? Derivative for ((p ⊃ q) ⊃ (q ⊃ p))? Use a half-angle formula to find the exact value of the expression.
cos 3pi/8? What is 1 and 1/3 minus 2/3?