Amswer please

This question: 1 point(s) possible During routine conversations, the CEO of a new start-up reports that 10% of adults between the ages of 21 and 39 will purchase her new product. Hearing this, some investors decide to conduct a large-scale study, hoping to estimate the proportion to within 5% with 95% confidence. How many randomly selected adults between the ages of 21 and 39 must they survey? The number of adults that should be surveyed is (Round up to the nearest whole number.)