An advertising firm plans to have a sample of individuals view a commercial on a ‘‘sunscreen pill" that one can swallow to provide mild SPF protection throughout the day. After viewing the commercial, each individual will be asked if he/she would consider buying the product. How many individuals should the firm sample to estimate the proportion who would consider buying the product to within a margin of error +-3% with 90% confidence?

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?

At school 460 of the students walk to school the number of students who take public transit is 20% of the number of students who walk. how many students take public transit