CH 2200 Lecture 18: Chinese common phrases and words 13

Two sociologists have grant money to study school busing in a particular city. They wish to conduct an opinion survey using 581 telephone contacts and 360 house contacts. Survey company A has personnel to do 28 telephone and 10 house contacts per​ hour; survey company B can handle 25 telephone and 17 house contacts per hour. How many hours should be scheduled for each firm to produce exactly the number of contacts​ needed?

determine the PH at the equivalence point.

Titration of 20.00mL of HC2H3O2(aq) of M=.500 and Ka= 1.8x10^-5with .500M KOH

I need to see work to understand what I am doing wrong thanks,points will not be given without work