2. Based on a study conducted by the Gallup organization, 80% of Americans believe that the state of moral values in the US is getting worse. Suppose that we obtain a simple random sample of size 80 Americans and determine which of them believes that the state of moral values in the US is getting worse. Do a p hat interval for this sample. p rounded to hundredth n= SE rounded to hundred-thousandth place z' AT 90% confidence level (found on confidence level table in your notes- m (there is a formula for it, round to hundredth place)_ the interval for p-hat (p ± m) small to large

Determine whether each statement is true or false. You have one submission for each statement. (a) If demand is unitary when the unit price is p = $4, then revenue will decrease if the unit price is increased slightly from $5. True False (b) If demand is unitary when the unit price is p = $4, then revenue will decrease if the unit price is increased slightly from $3. True False (c) Total revenue is decreasing when the demand is elastic and the price is increased slightly. True False (d) Total revenue is maximized at the equilibrium point. True False (e) Total revenue is increasing when the demand is inelastic and the price is increased slightly. True False (f) Total revenue is maximized when the demand is unitary. True False

For which value of k is { (1, 2, 3), (1, 0, 1), (2, k, 8) } a linearly dependent set?

Ornithologists have determined that some species of birds tend to avoid flights over large bodies of water during daylight hours. It is believed that more energy is required to fly over water than land because air generally rises over land and falls over water during the day. A bird with these tendencies is released from an island that is 4 km from the nearest point B on the shoreline, flies to a point C on the shoreline, and then flies along the shoreline to its nesting area D. Assume that the bird instinctively chooses a path that will minimize its energy expenditure. Points B and D are 9 km apart. (Round your answers to two decimal places.) island (a) In general, if it takes 1.2 times as much energy to fly over water as land, to what point C should the bird fly in order to minimize the total energy expended in returning to its nesting area? X km from B 10.55 W (b) Let W and L denote the energy (in joules) per kilometer flown over water and land, respectively. Assuming the bird's…