You wish to estimate the proportion of all voters in California who plan to vote in favor of a certain ballot measure. Obtain a sample size that will ensure a margin of error of at most 0.04 for a 95% confidence interval. Assume that it is reasonable to presume that of the voters sampled, the proportion in favor of the measure will be between 0.72 and 0.86.

incomplete question. how do you expect anyone to you when you do not post the question in its entirety?

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.