Edgar and rebekah are surveying their neighbors about the community pool. their questions, written on the survey, are below: edgar: how many times do you visit the pool in a month? rebekah: did you visit the pool this month? who wrote a statistical question and why?
rebekah, because there will be variability in the responses collected
rebekah, because there can be only one answer to the question
edgar, because every neighbor will give the same answer
edgar, because every neighbor can give a different answer

Nthe opening scene of the movie raiders of the lost ark, indiana jones replaces a golden statue with a bag of sand. the platform on which the statue is placed is designed to detect the mass of the statue. if the bag of sand has a different mass than the statue, then a mechanism triggers and destruction ensues. the density of gold is about 20\text{ g/cm}^320 g/cm 3 20, space, g, slash, c, m, start superscript, 3, end superscript. the density of sand can be estimated at 2.5\text{ g/cm}^32.5 g/cm 3 2, point, 5, space, g, slash, c, m, start superscript, 3, end superscript. the gold statue can be modeled as a cylinder with height 25\text{ cm}25 cm25, space, c, m and radius 8\text{ cm}8 cm8, space, c, m. in terms of \piπpi, what is the mass of sand indiana jones needs to avoid triggering the mechanism?