Question 1157326
8% error means z*SE=0.08; z(0.975)=1.96
SE=sqrt(.5*.5/n), because the probability  of people supporting is not known.  When that happens, use 0.5 as it gives the most conservative estimate.  The largest product of two fractions that add to 1 occurs when both are 1/2.

so 1.96* sqrt(.25/n)=0.08
square both sides
3.84*.25=0.0064*n, moving the n across
n=150 people